Bullying Consumers With Unexpected Bills/Costs

Since day one I have had issues with this company regarding billing , they combined my office and home on one bill even though I told them it's separate numerous times. I tried to give them chances but they just bill clients incorrectly and treat us like *******. The staff are *********** and don't care about clients. I have cancelled my voip services on the 3rd of May for my business which is 30 days notice till end of May and now and I being billed again end of June but there is no break down or explanations as to why. I have requested a formal confirmation of cancellation in writing but they just ignore my request and rather keep calling me . They switching off my fiber at home for services that belonged to my company. They ****** you to pay bills by turning your fiber on and off even though the fiber has been paid for. How can you switch off my home fiber because of office voip phones that you have billed incorrectly and don't even allow me 1 day to query it. You send notice of suspension before you even sent clients the invoice and then suspend the account 1 day later even though the services weren't billed for yet or better yet have been cancelled already and not in use. I was explained by a consultant that my bill is upto date and the cancellation has been processed but they still bill me end of the month. Nobody explains the cancellation process or costs upfront. Very sour company that likes to take your money when you want to leave them. I have even requested a cancellation quote to cancel everything and I was told I'm not allowed to do that. Even if I pay the cancellation costs upfront I must still use their services till the notice period is over