Poor service on cancelation and refunds

I have had an complete disappointing service from Rain. On their App I requested a call back on multiple occasions close 30 and received no calls back I call on the 16th or 17th of December to cancel and all was confirmed. January they deducted requested once again multiple times for a call back and non received Feb another deduction from my account after another round of requesting call backs I decided to call. Spoke to an operator was asked to hold the line and ended holding for 25min the called back and Spoke to someone named Hank/Frank who canceled my wifi with them. He then stated refund time for the two extra deducted months are 24 to 48 working hours. That was Saturday 16 Feb. Today 22 Feb when I followed up I was told it take upto 10 days. I then asked to speak to a supervisor/manager and received excuses after being on the line for 10+ minutes again. The cslled back held 15 min with no answer. Yet again I called back finally spoke to the Manager Sihle and got told a email should have been sent to confirm banking details before refund can be processed. No i was to 10 to 14 days from I submitted my details so in total I have to wait about 20 days when I was promised 24 to 48 working hours. This is totally unacceptable. I feel because the first operator was negligent and lued to me he can refund my immediately and then the company can refund him in the next 20 days.