RAIN CUT OFF MY INTERNET SERVICE

Good day I have a month to month contract with Rain, the company is an internet service provider. I have an agreement that I will be paying my monthly subscription on the 16th of each month, yesterday I paid my subscription, sent my proof of payment to 2 email addresses and to my disappointment my services were cut off, I sent another email to provide them with proof of payment in the early hours of the 16th and still no internet access. I called their help line a few minutes ago they said that I must send them my bank statement and I am uncomfortable to send them my bank statement as proof of payment as there are personal transactions on it, they insisted that I send them the bank statement. I would like to request that I be assisted that Rain accepts my proof of payment not my bank statement because there is personal information on my bank statement.