Pathetic service from Rain Internet service provider

I signed up for a month to month plan with Rain meaning i pay in advance for a service and then i get the service available to use. This has been working for the past year , i skipped a payment once and was blocked from using the service for that month... i thereafter continued payment for the next month but keep getting told by Rain that i am in arears and was told today that this is why i have pathetic connectivity.... i was able to connect from beginning of Feb till the 10 feb but now the agent tells me i have poor connection because of my outstanding payment ,, yet if i go 500 meters away from my current location i can connect perfectly.... so much for agent training.... not sure how the billing works then when im able to connect when im 500 meters away... does not make sense... further more if I was refused service for that month, why force me to pay it up if its month to month and how will you ensure my service that was blocked for that month.... what compensation will i get for paying for something I could not use???? please rectify your billing issues and dont make it my problem. really pathetic service.