not Authenticated

I Called in to find out why in was debited for my cellphone contract and not my laptop contract and to my surprise ,my details could not match on their system when trying to authenticate me MEANING Vodacom has been debiting me for almost 2 years yet they don't know who i am and now i have to go to a store yet i set at a store for almost 2hours just to get the cellphone now i must go back so that they can do their job guys come on this is such an inconvenience i mean i can't even get my account on the App because my number is not authenticate so what have i been paying for all these months?And you guys are debiting me different amounts all the time hayi !!!