Refund trouble..... turnaround time disgusting

I have been a client of Webafrica for over 4 years and not one time did money get deducted for my fibre, i always make manual payment on website. This month (October) I was unable to do that so i did EFT (R719) but i do admit I used incorrect reference (switched 2 letters around) I followed up the next day with agent (Linda) via whatsapp as I saw payment was outstanding and there was additional R50 billed, agent told me it takes 2 business days to reflect and my account will be fixed on 7th, so I left it. 2 days later R769 was deducted from account, with no authorisation. Of course Webafrica are impossible to phone so I immediately went on whatsapp and chatted to Nonti who advised the incorrect reference but it will be escalted for refund and someone will email me. The following day I chatted to another agent just to follow up, to be asked same questions, sent same proofs and was told turnaround is 15 working days, disgusting to get refund. when Webafrica want money they deduct with additional charges yet when its paid double I must wait nearly a month for a refund. Absolutely disgusting. I want my refund immediately. Agent Sasha Lee has banking details