I am very disappointed with Telkom's service

Today I sent the following message to Telkom by means of Messenger of Facebook after I tried twice to be called by an agent. Twice I have been called and twice there was nobody to talk to me: "I can't succeed in solving my problem by means of Telkom's website or application. I don't want to end Telkom's service to me; I just want to cancel the two standing contracts, so that I can continue by purchasing prepaid data in future. I send an email a few minutes ago to '***' but received a message that it can't be delivered. Why is it so difficult to render proper service? I asked twice to be called and twice the calls came, with no agent on the other side!" After sending the message above, I received a promise by Messenger that "my Special Forces team will be in touch with you". Needless to say that didn't happen.