Getting nowhere with Repair

Bought a Dell Laptop from FNB Dot Store.Discovered that the battery is not working if not plugged in.Phoned Fnb to ask them to collect for repair.1 week later still no call to collect.Phoned again and they said the will call back.Phoned on 02/04/2015 and said they will collect that day.On 08/04/2015 still not collected and phoned again.Then they said the will collect that day.Gave my work address.Hours later they phoned standing in front of my house,so said i told to collect at work,later that day they collected.on 09/04/2015 they phoned 3 times again to collect(already collected)product and actually ones were standing at my house and wanting to collect.Told them the battery faulty.Then after waiting weeks for reply i phoned them and they says that Laptop got Liquid damage.After complaining that there were no problems with keyboard and stuff they claim no one from technical has called after asking them like 5 times already.Lady phoned on Tuesday 05/05/2015 wanting to send quote for repair.So i told them send laptop back because only problem it had is the battery and i will replace myself.Still no laptop back and Asking for supervisor to phone still no call!!!!Worst Service ever