RepairPal Certified shops can diagnose and repair your 2002 Mini Cooper. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Sounds like you are in limp mode. You will need to scan the computer for codes to start. If you don't work on your own car then use this link to find a good shop near you.
https://repairpal.com/repair-shops
Alex