Poor service delivery

I am utterly disappointed with the Service I received from Vox. I upgraded my line on the 17.07.2023. I have been charged the full amount for services that were not rendered. I asked numerous times to be contacted with no contact plus I also tried calling and have to hold for more than 30 mins and no one even answers on each interaction. The speeds I'm receiving is not even half the speeds I'm paying for. This service is really poor!!! I have also been in contact with technical support and I was advised the query will be resolved the next day. I sent numerous emails to the technician dealing with my query but still no feedback. I even sent an email to follow up to which I haven't received a response. Is this how you guys plan on retaining clients???? Level of service is a whole different level of poor