Double charge

Yesterday we used taxify for the first time. We asked the driver if we should pay cash or they will debit on our account. He said we should pay cash. We paid him 650 rand. Taxifu still debited our account. The driver's name is Kgadi ********** . We contacted Taxify and they advised they wont reverse the double payment we did and we should contact the driver. What kind of service is that? Their driver's phone is off and we cant get our money back. Please becareful when using Taxify. Do not ever pay cash! Now we stuck and no one to assist us. Bad service of the highest degree!