AIRTIME EXPIRES

I called the call centre on the 01/02/16, was told it can take up to 7 days for someone to get back to me, still no one has called me. I called yesterday, because i have missing airtime. Was told that if airtime is not used up airtime is forfeited. I informed the lady that i paid for the airtime, was not given to me for free by vodacom. she said just like bread has a expiry date so does the airtime which i was not aware of. i told her the airtime does not go bad. Said she understood what i was saying but thats how it works, i informed her that no one told me that when i took the contract out, she said i should look at my contract as it is there. how many people are been **********.<br> i have paid for that airtime, to me it feels like vodacom is now forcing me to use my airtime, if not they feel they have the right to forfeited it, i most definitely dont agrees, they do not give me the airtime for free. very unhappy