BOX OFFICE NOT WORKING OVER CHARGING ME

A GUY PHONED ME TO GET AN EXPLORER TOLD ME THAT MY PVR IS NO LONGER GOING TO WORK I SAID THAT I WOULD TAKE UP TE OFFER HE SAID I AM ONLY GOING TO PAY R169 PM EXTRA I GOT THE EXPLORAR WAITED ALMOST 3 MONTHS FOR IT TO BE INSTALLED BOX OFFICE IS NOT WORKING I PAID R1249.08 DONT NO WHY THE LADY SAID IT IS A ONE OFF DONT NO FOR WHAT SAID THEY WOULD PHONE BACK NOBODY PHONES BACK SEVERAL TIMES I WANT TO KNOW WHY DO I HAVE TO PAY SO MUCH AND WHY IS MY BOX OFFICE NOT WORKING PLEASE CHECK ON DSTV'S SYSTEM HOW MANY TIMES I PHONED IN MY AIRTIME IS OUT AND NOBODY IS ABLE TO ASSIST I SENDED EMAIL TO ONAIR AND TO THE PEOPLE WHO INSTALLED THE EXPLORAR NOBODY IS ABLE TO HELP PLEASE I NEED SOME ONE TO HELP ME I AM PAYING FOR SOMETHING THAT IS NOT WORKING LIKE IT SHOULD AND I AM PAYING WAY TO MUCH WHY ??????