Bad service

ive been battling to get my account closed since May this year after i had paid up both accounts, but your call centre calls me everyday demanding me to pay and they nver listen when i tell them that my accounts are paid up. ive sent my discount offer and proof of payments close to 20 times but no one wants to help me. i even escalted this to a team leader Oliphant Mathatho who never responses to my emails and side line rude when i call him. please can you close both my accounts and send me proof to this email ***