Shocking Service and misleading me.

On 25 May 2017 a Vodacom rep saw me regarding Vodacom fibre service. It really appealed to me, R449 per month with 25GB data, and I signed up. He told me the service will be installed by the 25 June 2017 and that I must cancel my Telkom service line and WiFi..this I did. After numerous phone calls on 26 - 30 June I was still in the dark. A guy called Alan promised me he will escalate this to the highest level. Some service provider helped me in the meantime with a router for WiFi with 10 GB. Needless to say every 2 weeks I had to top up. My bill arrived and I had to pay R1117 for this service!!! All they said was I have to pay!! Now I understand that the fibre service in my area won't be live for another 3 months but they have already billed me for last month!! I think that is ridiculous and I will seek legal advice . They have sold me a service which does not exist!! What shocking service!!!