The wheels are coming off...

I've taken out a new contract with Vodacom, the initial interaction was superb. After the sale was concluded, the wheels came off. I've been debited twice, nobody really knows why, I'm not getting feedback, I've asked for assistance, so much so that I've even been inside a Vodacom shop, nobody can help me. I'm being referred to Accounts, who cannot be reached telephonically, and if I'm fortunate enough to get hold of them, they can also not give me answer. I need my account to be refunded with the additional debit taken. It was apparently taken because a 2nd SIM card was activated in error. I've migrated from prepaid to Contract, I've been sent an incorrect size SIM card, and then that incorrect sim card was also activated, after I made it clear that I don't need a SIM, but it was in the package. I'm really thinking that I've made a mistake to take this contract with Vodacom. I've logged numerous online queries, nobody is getting back to me. I'm FED UP with Vodacom's poor service. I ask again..are the wheels coming off?