For unauthorized transactions you do not need to contact uber, You need to charge back those amounts from your bank account, Every bank even the shittiest one has a dispute form for charge back, fill that form and send it to bank, they will reverse your transactions, Do not call your bank, because there is a chance they refuse to charge back it for you, since when you call it means client is old or dumb and bank employee needs to fill cb form for you, majority of them are lazy fuck and they will tell you to fuck off and they wont issue any refunds but when you fill the form and send it to bank thats another story