Update of account on the system and clear any error and reinstate the debit order.

Iam honestly tired of this company ,the struggle never stop.every month Iam told I have to sent proof of payment yet there is always arrears on my account yet I pay on time each month.can I please ask for the last time that my debit order be reinstated,honestly regret the day I took this cell phone contract and can’t wait to finish it because your services is the worst.