Unacceptable service from Vodacom

I wish to make a complaint against Vodacom for two reasons. One I am constantly being smsed in the early hours of the morning about 03:40am about a Deezer account description. This is disturbing my sleep and I find it totally unacceptable that I must have this marketing forced on me. I am not interested in a Deezer subscription. Secondly I purchased a R12 1GB promo last Wednesday. Which was to be vaild for 7 days. However upon trying to using it at 00:00 I saw that it did not work and that instead my airtime was dedcuted. This outrageous service is beyond a joke. As a customer I am disgusted.