Vodacom's empty promises, and then you receive a huge bill...?

I have signed up for fibre via internet on the 5th of June 2020. Vodacom (Mishan Ramajhan) promised me 100GB to use while I am waiting for the Fibre connection. WE DID NOT RECEIVED THE 100GB THAT WAS PROMISED. We have received the WIFI router - but no data to use as promised!!!!. I have sent emails, whatsapps ETC, phoned him without any joy...!!!! On 11 July Vumatel connected the fibre, and they informed me to contact Vodacom to connect. Must say Vodacom's call centre is useless. I have contacted them several times, and on 16/07/2020 I could connect to an operator 'Vuoy' who was able to assist me with the Vodacom connection. 2 Days later we could make use of the connection. The deal said no connection nor installation fees, only monthly instalments of R649.00 as confirmed with Mishan telephonically. Well, I have received an account as from June to July 2020 - Vodacom charge me R1,092.66 for the fibre, which I could NOT use in June - only after mid July, we could use it. Kindly look into my account number I***-0 as this is ****************. I have send my queries with regards to the account received, via e-mails to Vodacom last week, did not even received a reply... not a phone call.