Cut off my services even though account was paid!!

February being a short month, MTN debited my account before my actual payday and therefore the amount was not paid. I have requested for the debit date to be on the last day of the month numerous times. I contacted MTN on 2 March 2015 to notify them that the debit order had returned unpaid and I would like to make payment to them to avoid any issues. I paid and sent proof of payment to [Email Removed] on 2nd March 2015. Today, 2 weeks later my service has been suspended due to no payment??? What happened to my payment made??? I rely on my cellphone for work and now cant get through to the 808 call center. I want this rectified immediately or you will be in breach of contract as I have paid for services you are not delivering and will port to another provider.