Bad service from Vodacom

We have been trying to change from DSL line to fibre but have had problems from day one. Vodacom have installed their router and the wrong package was installed. We app**** for a 10Mbps uncapped line and were given a 4Mbps. I have been trying to upgrade to a 10Mbps line. Numerous calls to Vodacom and eventually I spoke to someone who I thought knew what she was doing. Chantal updated all the data on Vodacom side and confirmed that we were going to have a 10Mbps uncapped line ********** for a 24 month contract. She explained that the migration would take place on 1 July 2018 as Vodacom preferred to do their migrations at the beginning of the month. She also asked me to confirm that everything is on track around the 26/27 June 2018. I phoned on the 27th June and was told everything is confirmed on the computer that migration would take place on the 1st July. I phoned this morning and was now told that they (Vodacom) cannot offer me a 10Mbps uncapped line as Vumatel only have 4 or 20. I now have to send an email requesting that I have an upgrade to 20Mbps @R800 odd Rand. This is unacceptable as I was offered a 10Mbps uncapped contract at R699.00. I have a strong desire to cancel my contract with Vodacom and go to another Service Provider who will give me a better service. We chose Vodacom as our Cell phone contracts are with Vodacom and we have no problem with that. If this is not sorted out by this afternoon 16:00 we will certainly cancel all and go to Mweb.