MTN disconnection of services

Im on MTN Contract i paid my monthly bill on the 9th but was disconnected on the 18th MTN says i have outstanding amounts. I emailed proof of payment on the 18th to [Email Removed] and MTN specifically said they will reconnect within 8hours. I also sent proof of payment via their facebook page. This was 2days b4 the strike and 6days later im still disconnected. MTN is in breach of contract as they are not giving the service im paying for. I believe im entitled to refuse to pay as im not getting services that i pay for.