RAIN **** BILLING

im very not happy with Rain and its poor customer service..... im a very loyal customer for years now... my billing date were the 25th of each month which was very stressful for me as when they debit i dont have money on my account since i get paid on the 28th.... on the 26th september my services was suspended pending paymenys.... i made manual payment on the 27th September and request to change my date to the 1st of each month to avoid service suspensions.... that was after the payment was made.... on the 2nd October rain debited me full amount of R529 again.... and now they telling me money i paid was for august and money debited is for September.... my question is that... if i didnt pay on the 27 September were they going to double debit me on the 1st of october????????? that is the question.... their Support manager told me that no they wouldnt have debited me twice.... and i asked her when would have been my next debit she said 1 november and asked how much she said R529..... so what excatly did i pay for on the 27th of september???? im sick and tired of this people not getting back to me