IRRESPONSIBILITY OF FNB IS THE CLIENTS PROBLEM!

I ordered a laptop from you guys in November 2015.It was to my dismay that i had not opened the device within the 7 day cooling off period,After i had opened it,obviously i had to put the device on to understand that it is faulty!The mouse pad was not working properly and the device was running very slow.So i called in,early December 2015 to ask to please cancel my contract and collect the device,and i also made it clear that i do not want to be debited at the end of December 2015.No attempt to collect the device had been made,and i specifically said that no debit should run off my account!Still,you debited me for something that was your fault.I called in so many times to follow up on a job that supposed to be done by you!You have poor client service and poor feedback!I called again,so many times in January!And you debited me again in January!What the hell!So i call to query and still nothing was done!You guys only collected my device in January,you don't follow the necessary process of cancellation, and you debit me again without my authorization!The device was sent for repairs,and i have to pay for the delivery!Again!It's your fault the device is faulty!why should i pay!Disgusted