Refund procedure pathetic

They can debit my account quick every month, but when it comes to refunds its takes forever and numerous calls, called to check the status of refund but error with my banking details... But never error when taking from my account. Every time a call is logged and i have to wait another 7 or 14 working days.... This is unacceptable... Its my money and i have to wait and struggle to get it back, times are tough, when i initially took out the contract it was there fault coz i strictly said that i can only afford 299 a month and debiting over R2000 made my daily life difficult, iv been a loyal customer for years and know this happens. Very disappointed vodacom.