Poor services

Good morning, I have been with Rain for 4 years. At the begining it was told to me that it is a month to month contract. If you do not pay you do not get the Rain service. I have bee struggling a lot this year with my finances and I have skipped about 1 month the first time. Rain called me and told me no I need to pay up as I used the wifi. So the first time I did got all my paymenst up to date. The second time I fell behind alot I was behind with 3 moths out of the 3 months I never used the wifi for a two months. They told me now that I owe them R1700 witch I do not have due to me canceling with them they never called me when I called them I was put on hold or told that I need to pay up. This is very upsetting and I will pay the months for witch I used my services for the extra two months. I have proof that I put the router of for the remaing time cause I new it was a month to month conract. One of the agents told me it changed however no email no call about that. Thank you for listening.