100GIGS promotional data

I bought a pocket router which wouldn't be for the 1st I do at Ackermans Menlyn Mall and there was a promotion of a 100Gigs 50day and 50night on the 31st of August but never received the promotion this time around, I feel ****med by the store for false advertising cause this data would made my life easier for the month of September for work purposes now I am going out of budget for my hard earned money,