Telkom billing please relook at your processes and billing

A month ago I took out two computer contracts and had to return one computer because of its out of box error, an HP laptop. No problem, I then subsequently canceled that contract to replace that computer with a Huawei laptop because of their lack of stock at the time. Great Telkom failed to cancel the HP contract and charged me for three laptops but I only have two. Totally ridiculous, calling the call centre is also a nightmare - I am being pushed from pillar to post with no joy.