Uber, no contact for support.

I registered a few years back. My credit card expired in January. Trying to change payment option in the app (as they advise) the app won't let me proceed stating your account is temporally deactivated. It also reflects that they made a R10 deduction for no reason. There are number to phone, no email contact and their facebook page reply did not assist at all. I would like to use there services and renew my card details. Please assist if possible.