Uber doesn't want to return my funds and they wont respond to me anymore

on Christmas day l ordered a ride and funds were deducted from my account and an sms from my bank was sent at the same time and my balance went down. When the driver arrived at the pick up point his phone battery had died so he could not start or cancel the trip so he asked me to cancel on my end. l did and requested for another ride. Those funds deducted from my account did not return, l followed up with my bank and they advised me to follow up with Uber. l followed up and they said those funds will be returned once a trip is completed, l explained that l didn't take the trip, sent them screen shots of canceled trip, sms from the bank but nothing panned out. Same day l requested another trip, completed the trip and the other funds were not returned, they are telling me to follow up with the bank but since the 25th up to now its showing in progress from Uber end, l sent screen shots of my bank statement being double charged plus bank charges and the screen shot of the pending authorization, still nothing, they had the audacity to tell me they will never respond to my issues again.

Such day light *******.