MTN is a ****

MTN with their month to month router plan is a **** i would not recommend it to anyone. I have a contract with MTN for a month to month plan where I pay R499 monthly, recently my invoice came said I owe R782.80 when I inquired about the R782.80 I was told I owe month of July I have to pay that amount when I paid R667 now my router is offline there is no network