Shocking Service

I recently wanted to cancel a number of my contracts with Vodacom, however when I phoned into their service centre, the retentions department proposed a number of very good packages that they tailored for me which I accepted. All of this was sent to me via e-mail and on Vodacom letter heads - now it was not activated as agreed and nobody can assist as it is \not on the system". I have spent more than an hour on the phone this morning - been to customer care"