Billing Dispute

I was called by Cell C collections department on Thursday 6th September 2018, requesting a payment which I disputed, billed in April and May R30.00 then June R58.50, July R59.62, August R65.00 and September R65.00. Where do they these figures from? I have a downgraded my contract from R50.00 to R30.00 a month since April, it for airtime only. Payment was made in May R30.00 and 5th June for R120.00. Explained to consultant of the contact which states R29.95 per month, they mentioned they did not have that contract, I then emailed it to them. I told them to listen to the voice recording, which they did and consultant stated that the agent forget to load that contract. My line has been suspended since Thursday. I have spoken to 6 different consultant and they said that they would look at my complaint, I called 084135, 084145, billing and retention department still no feedback. Email sent to ********** still awaiting a response. I need this to be resolved urgently. If not I will have not option to cancel my contract. I have being a loyal customer for the past 10 years.

I am hopeful that I will have your attention to resolve this problem. Compliments to Nthabiseng Lehola from collections, excellent customer service and at least one person who knows her job thoroughly and gets back with the proper information.