Extremely Dissatisfied w/ How they Handle Issues

I am writing this after days of frustrating back and forth with home Connect. I cancelled my account with them on May 17th 2023. I did all the steps laid out to me. No where in the steps, does it say that I am to receive a separate email and/text that will confirm my cancellation has been received. I got the pop up that said that my request was processed. I logged out and logged back in (because I have had issues with Home-Connect in the past where I log in a request on my portal, and it does not go through). When I logged back in, the message that my request was being processed was still there. Mind you, at this time I am moving and have a lot going on. On June 26th, I receive an invoice for the July. I enquire about it, and I get told that my cancellation did not go through. I have had numerous calls with call centre, customer care and the escalations department. All they seem to say is "It's not our problem. You still need to pay for July". Not only do I think this is *********, I think they have not tried on their side to properly investigate where the link was broken. They first claimed that I never even logged into my account on the 17th of May. I sent them screen shots of my internet history, and now they just went mumm and sticking with "It's not our issue". Today though, the advice I received was that if I do not pay the amount, they will block access to wifi for the current tenant. I cannot in good conscience advice or force the new tenant to take up a contract with Home-Connect just to resolve this issue. I am extremely dissatisfied with the level of "resolve" on this. Will never recommend.