Money not going up after wining races

Has this been fixed yet because its been happening to me since day one. I gave up playing the game and uninstall it. Now years later i reinstall and its still happening. I tried resetting progress, uninstalling and reinstalling. Nothing worked. My guess is that it happens because when the game first came out I downloaded the trial version and upgraded through the trial into the full version. My credits don't add uo after every race. They just reset to whatever I won in the last race. So I can't buy cars. It's very frustrating. Please can you help me? Thanks