Upgrades pathetic-bill wrong-disconnected service

Charged for upgrade contract in March invoice and new contract only kicks in 1 May.I've paid my cellphone contract on time, 25 March 2015. Logged a call - reference number 627686 for the incorrect billing. Now my line is disconnected. Called call centre again on 2 April - first I can't get through to customer services. then I'm transferred from new business to customers service - Spoke to Linton and was disconnected, then spoke to LIndiwe and Ms Mela reconnect my line. <br> <br> 21/04: I get my April statement: March credit for overpayment shows but again charged for May upgrade. I immediately phone call centre, first i struggle to get through on call centre, then I am sent from customer service, to accounts, to upgrades, to get told they need speak to original upgrade consultant Hector Moloi. <br> 24/04l I get an sms to say my credit request is sent for approval. Also paid invoice on time.<br> 7/05: I get sms to say my line will be disconnected. I try phoning call centre but struggle again. <br> 8/05 my line is disconnected. <br> 11/05: I speak to accounts and they reconnect me and transfer me to upgrades where I hold on for 20min then hang up, <br> 12/05: l I'm disconnected again. PATHETIC SERVICE