Incorrect billing

I have sent the following email to vodacom complaints email on 15/04/2018 and havn't had the courtesy of a response more than a week later. It is disappointing that you cannot speak to a supervisor or manager at vodacom.

Good day,

I would appreciate if someone could please assist me with the following:

1. Why did all my lines (excl. VAT amounts) go up on my invoices dated 1 April 2018?

2. May I please ask if someone can forward me all my invoices from August 2016 to July 2017?

3. I phoned last month to query the handset charge on line ********** 330. According to me the previous contract on this line was to come to an end 28 February 2018. When my husband phoned to inform Vodacom that we would like to cancel the contract at the end date the lady who he spoke to offered him the following deal and asked not to cancel. Monthly fee of R349.00 which will include clip an 5G data for 24 months. We did not sign up for a new handset and we also never received a new handset. The gentlemen who assisted me with my query about the handset charge x 2 on the invoice dated 01/03/2018 said that this was still for the old contract and he promised that there will only be the amount of R349.00 for this number going forward. The handset charge x 2 is on my April invoice again? Please explain to me why there was a double handset charge in March and again in April?????????