bought a laptop that worked three times only

i i upgraded my contract and took a dell inspiron core i5 laptop with the huawei modem. the laptop only worked three times and now it will not charge. it is not the battery but the charge port on the unit itself. i lodged a complaint with the platinum warranty who said that it would take 7 days to collect and then another 7 to replace. more than a week went past and no collection took place. i phoned again only to be asked for the reference number which i wasnt given, i was then told that the serial number hadn't been confirmed which i gave again and was told that they would call me back that was two days ago. the service agents name is henrico .<br> i am going to billed for a unit that does not work, it didn't even make it past a week before breaking down. i visited the store who also emailed the warrantee agent but even that has not helped. <br> i am frustrated and concerned by this please help.