Just want to threaten people without keeping them happy

I am very disgusted with teljoy service ive been with them for 3 years now and never got eny good service out of them been complaining about 2 years now for a broken tv and bed that i cant use but i was paying for every month tried to get ahold of them have every prove possible up to date and when i felt like im wasting my money i stopped payment and only then got a threatening response for reposes from then and then Samuel duimpies phoned me and had a conversation with him on what was going on so he helped me a litle and i told him will not pay for the outstanding if i could not ever use enything at that time so after that a manager phoned me and threatened me that now i should pay a fine for the broken stuff and i sefused and got ahold of Samuel duimpies he orgenized people to come fetch my television and apon arrivel i told the drivers the problem so they gave me a new tv same time and said i will struggle to get repairs on the stuff so after a month i saw that my billing amount was way higher then expected and did not pay it then Samuel phoned me and told me that i agreed on the outstanding to be added what i never dit but with respect i left it cause at the time i started getting a service out of them but now again its been almost 5 months later and still waiting on the come back for my bed and why i need to pay fines and then i got billed for the whole outstanding amount and was threatened again about 3 to 4 times in one month to repo the goods and then about a month ago i struggled to make payments due to tbat i am self employed and sent an emails to apologize for that and made a monthly payment still and yet again today I've been threatened for repo because my balance is outstanding for about 120 days when i skipped 2 payments in the time the arrangement was made what can i do to resolve this im really unhappy with the service and cant see a they can be operating like this