No call back as promised

I went to Vodacom's website to do online shopping for a new contract for a data sim, everything went smooth online, once I have was done checked the item, I received an sms and an email stating that one of the consultants will call me back within 24hours to complete my new deal request, should no one get back to me within 24hours I can call in. Its been 2 weeks and to this date no one called me back. I have called in 3 times the 1time I was advised that they have technical problem in the call centre, I called in again on the and I was advised that they will transfer me to the next depart for credit approval I was on hold for more than 15mins until I hung up I called back again and again I was transferred and I was on hold for another 15mins until I hung up again, no one even bothered to call me back and assist. I am a Vodacom customer for a very long time and I've never experience this kind of service when taking out a contract. other companies react very quick when there is an online sales available, but it seems like Vodacom does not need more clients to promote their brand further they have enough exposure. I am very disappointed as I never received such service.