Vodacom delivers very poor close to no service !!!

six months ago I made a claim at Vodacom I was advised to pay R500.00 Access fee which I did. Two weeks later i received a call to collect the laptop , when i got there i discovered that its not the laptop i signed for in my contract with them. They advised me that there has been a mistake and they will contact the insurance as the entry must be reversed and they will get back to me with the new amount i should pay for Access. Its been six months now i have been to them so many times they just say they waiting on insurance company while they still deduct monthly instalments for a product that i dont have. I dont know what to do with them , it seems they just interested in making deals and once that is done they are done with you. When do i get my laptop what happens to all the money I paid for these past months?