Rain putting internet off after payment

After making 2 payments in two months to make sure there is no issues with them cutting off internet connection out of the blue, they still have the nerve to put it off right after I made a payment of R1190. This is pathetic. How do you pay almost R2k in 2 months and they just put it off a day after you paid. No use requesting a refund because you can't get a hold of them. I phoned from different numbers calling various numbers of rain, I've been put through 3 times for the last person to make an excuse and just put the phone down after waiting on call 30mins. I have been with rain for years but the recently they making everything difficult. I want a refund so I can get a better isp