data not allocated to spesific nrs

I purchased a vodacom smart tab with 100 mb data included for 3 months once sim was activated. I activated sim by doing a sim swop to keep old number and havnt received my data. Phoned customer care whom informed my i cannot get my data because i needed to activate new number. Surely there must be a way to allocate my data to the new simcard but old number??? Also i tried to recharge with 250mb of data which was also not allocated, yet customer care says its there????