UPGRADE REFUSAL

GOOD DAY. I HAD TAKEN OUT A CONTRACT FOR MY DAUGHTER IN 2006, AFTER HER FALLING BACK WITH PAYMENTS, THIS WAS EVENTUALLY BROUGHT UP TO SPEED AND THE CONTRACT WAS PAID OF BY THE TERM END. I HAD TAKEN 3 DIFFERENT CONTRACTS FROM 2009 UNTIL NOW AND THESE HAVE BEEN UPGRADED THREE TIMES SINCE. I AM DUE FOR ANOTHER UPRAGE AND I AM NOW BEING REUFESED BY CELL C DUE TO THEM CLAIMING THAT I DIDNT PAY THE CELL CONTRACT FROM 2006.3<br> THIS IS ABSOLUTELY RIDICULOUS. HAVE THEY BEEN ASLEEP FOR 9 YEARS OR ARE THEY JUST TRYING TO PULL A FAST ONE ON US? I AM A PAYING CUSTOMER AND I EXPECT THE BEST SERVICE FROM A BIG PROVIDER LIKE CELL C.