Still no reply

I recently cancelled an upgrade i made on my line and the parcel was collect last week Friday. However I am still seating on a Postpaid contract which I cancelled and no reply nor any assitance from both the person that upgraded me and your Customer service department.<br> <br> Exactly how does your company operate? lately I am receiving nothing but bad service from your call center. It takes 3days for a sim swap and now this? I need you to fix this line asap or else i wont be realiable for any charges