Vodacom Neglicence!!

Unbelievable, do not use Vodacom!!! I am so frustated and upset. I have been a Vodacom client for 10+ years. My account have never been in arrears and goes of with a debit order. During the first week of May 2018, my Iphone7 that is on contract at Vodacom, 7 months in the contract stopped working. "no service". The phone was send in for repairs and travelled all the way from Western Cape to JHB and returned in a week's time with reason not fixed. Upon enquiry the vodashop in Tygervalley mall didn't know. Calling customer care on the 10th of May they informed me my phone is blacklisted I should call the accounts department. Accounts department couldn't indicate why it was blacklisted, the computer showed account in arrears. Upon further investigation Vodacom confirmed the account is not in arrears and nor have it ever been. The reason was then someone at vodacom blacklisted the wrong phone. I had to complete an unblacklisting form. It was send on 12 May 2018. I am still waiting. They keep sending me from one apartment to the next and no one can solve this problem that was created due to neglicence on Vodacom's side. Besides for it being very inconvenient to find a replacement phone, taking up all my time, Vodacom still expects me to pay the contract eg the phone that I couldn't use for almost a month due to error and neglicence on their side!!!! They have no email for customer complaints. This is unacceptable.