I definitely see this as a strong miss match in expectations. OP went in, expecting the LHS to tutor them, however the specific LHS doesn't do tutorials/troubleshooting (or at least not here). Given the irritated tone of OP, we are likely getting a very skewed report, which may or may not be reflexive of the actual interactions.
That out of the way, lets start with some of the addressable issues in the comments:
eclipson blackwing - from what I can see this is a 3D printed wing, definitely not a first plane for someone to be flying. 3D printing is going to make a plane that is well heavier then foam and much harder to fix when it crashes. It is also a wing, which is more sensitive to CG issues. Given the context of the original post, this feels like it was a first plane option.
spent over $600 trying to get into the hobby - ouch, sounds like you could have used some better 'getting started' information. You can get a Spetrum 6e + 6 channel receiver for ~$200, ~$80 for a power pack A, ~$15 for a battery, ~$30 for a charger and under $5 materials if you have basic crafting supplies. (you could even get a cheap namebrand TX/RX for about $60 for the combo and get this total around $200 to get in - someone might even be able to point out a cheaper path). Unfortunately it appears that you got pointed in a very poor direction on what was a good idea to start with. Best thing to do next is to learn from above mistakes and move forward. I don't know if I even have $600 in the hobby and that is with 2 TX/RXs, 4 planes worth of electronics and enough foam/etc. to make more planes then what I know to do with...
pop from inside the rx and smelled burnt plastic - my thought would be something incorrectly plugged in, which caused an overload in parts and released the magic smoke, definitely not something I would expect the LHS to fix/replace for you. You might be able to contact Spectrum and see what your warranty is, but unless they use the LHS to handle the warranty, it isn't the LHS' job to replace it for you.
Interactions with the LHS - Sounds like the LHS isn't the right place for you. I can't comment on if the issue is with the LHS, you, or some interaction issues with you and one of the employees. Either way, It sounds like a bad place to continue interacting with for both you and the LHS. I would just move on to another method of getting your parts... or at least rethink your relationship with the LHS.
Multiple comments - sounds like you definitely need a local mentor, if your in the US, you could check for AMA fields and see if one of the ones near you offer training/mentorship. Just make sure to come in with a good attitude and willingness to learn.
What to do next: I would suggest giving the fine people here a list of the equipment that you already have, then _listen_ to the recommendations of what to try to start flying with. I only started this hobby not to long ago and the Tiny Trainer took a bit to get the hang of. I have actually built the fuselage 4 times (one of the builds was to make one for my son, so 3 rebuilds and 1 extra).
I personally would recomment putting the 3D printed wing on a shelf until you can fly a traditional wing foamy airplane. Ideally with the help of someone local who can buddy box you or give you guidance. Please reflect on all of this and remember that the people are people too and the best way to get positive reactions is to treat the people around you the way that you would want to be treated, even if they don't treat you that way back.
