Billing Customer Services and it al

CELL C has the most pathetic service in all divisions. We requested cancellation on the accounts a lady in the billing advised there is a Credit amount and a commitment fee that will be deducted from that amount. They advised that the credit will be sent to the account today I called again for the paid up letter transferred 6 times to get to someone and then told we must pay for the billing on a closed cancelled account. Cell ********** 658 AND ********** 780, now we must pay. Your guys customer service emails and retention have not service . Emails sent a month ago has not been responded. Don't u have SLA , I am so glad that we have cancelled all accounts with you guys as I have never experienced such disgusting service from any network like yourselves.