Not able to customize cars, edit effects, or even buy or sell anything.

I am currently not able to do anything in this game. I just wanted to enjoy it and finish vol 9 so I can get the bmw m3 anniversary edition but I can't even edit the vehicle, let alone sell it to buy it again. Everything reverts to what it was before editing it. The settings reset themselves, the tuning resets, and I can't even edit the car using the body kits and parts section. I've tried several troubleshooting options such as resetting the game, uninstalling everything and reinstalling everything. Everytime I try buying anything it says "PURCHASE FAILED" Everytime on every car. plz help :(