100gb for two phones not honoured

Mtn lie and cheat and ***** and will do anything to get out of their obligations. In February we took out a contract for two phones,(a 2 for 1 deal) in the advert it shows that both both qualify for 100gb data each, to this day they keep disputing this, I have a copy of another advert which is another deal clearly shows 1 phone being entitled to the 100gb, so not only was the advert misleading it was downright dishonest. Mtn have declined to answer my emails so instead of the ASA i will be lodging a complaint with ICASA and any other channel available to me.