Customers number Summarily blocked after 18 years

COULD NOT DOWNLOAD VODAMAIL. <br> MESSAGE POP UP SAID PASSWORD WAS INCORRECT.<br> ON VISITING A VODACOM SERVICE CENTRE WAS TOLD THAT MY NUMBER IS NOW BLOCKED.<br> IN ORDER TO UNBLOCK THIS I HAVE TO FIND MY ORIGINAL CONTRACT NUMBER GIVEN 18 YEARS AGO AMONGST OTHER THINGS, AFFIDAVITS, FICA ETC.<br> <br> I HAVE NOT USED THE NUMBER AS I HAVE SUFFERED ILL HEALTH SINCE JUNE<br> <br> COULD THIS, SO CALLED , SERVICE ORIENTED COMPANY NOT HAVE WARNED ME, SMS, EMAIL PHONECALL..?