Im really sorry you went through this horrible experience. I honestly don't understand why many boost mobile retailers give false info to the customers is not like we get payed by commission well i don't.
The LG Tribute HD original retail price is $79.99 so thats the most he/she could had charged you since is discounted to $49.99 or if you switch to boost 100% free on the phone.
Maybe they charged $80 for the phone an $20 for activation/swap
The camera is good but just because is LG has the best thats not true
If you are really unhappy go back and try to return/exchange do what makes you happy not feel pressure for what they say. Remeber is your money not the clerks. See if you still have time because some store give you 3-7 days or 30days to return. Its a good phone dough
Hope i was able to help you have a beautiful day try to enjoy