I want my refund

Awaiting for my refund with no assistance from them, I received a message that my account was in arrears on my pay day that I specified with them and decided to make the manual payment thinking my debit did not go through... biggest mistake of my life, the payment I made is reflecting but the debit is mysteriously not reflecting since last week Friday the 26th it now the 30th, their agent Wendy's solution was that I lay a complaint... and after she dropped the call on me... now no one is picking up my calls, I am being placed on mute... I am soo disappointed with the service, minwhile it's my son's birthday this weekend and I am depending on these very same funds... I have sent my bank statement no reply on their support portal... and this also happened with Mpowa finance on the very same day, they also debited me after making payment and refunded me the very next day on the 26th... so how come with Fasta I being told my funds have still not yet reflecting... they bank with FNB it takes 2business days for funds to reflect from Nedbank...