They started by stopping method of payment

They started by stopping method of payment. My card option was stopped. I continue using cash payments. From the beginning of June , I was told that I owe a previous trip , it happened twice , I ended up paying for a trip already paid. I wrote to uber app. There is no solution. I don’t have answers why they stopped my card payment and later uber cash . I tried to escalate the matter even on twitter. I’m stranded now. No one is resolving this mess .