Uber authorization holds taking my money not refunding me

My name is Desiree Account linked to cellphone no *** please refund me.Last week my som cancelled a trip .He ended up paying cash om next request . Then the next day,same thing we canceled a ride it waa taking too lomg.And requested a new ride paid via card .Uber Held both monies .After a complaint i got 1 refund back .The other one they refunded me R18.77 which was only a cancelation fee. The amount that came out of my Account was R212 amd and R225 .I can still see R225 on the bank as uncleared .Is Absa holding this money or is Uber? I need it now. I need to get to work .Also today My son again driver cancelled the trip R257 Was the trip amount .Uber then refunded me R10. We couldn't even book because I don't have more money in my account .That's my last last money .Why they refunded R10 and not R257. The amount remains uncleared on Absa stil.It don't show on my bank statement .means these are not valid Transactions right ?who must send me the money Uber or Absa. im ****ed off