Mr price mobile is a ****

I had a phone contract with them in 2018 and finished the contract...last year one of their rude agents called me to say must pay the as I am still in areas...I was shocked to find out that I was owing them...they then further explained that I should have sent an email to say I am cancelling the contract...I agreed for them to deduct what they say is outstanding...then I sent am email to them saying that I am cancelling in January 2021 already....to 2 September 2021...they called to say that I should pay cause I owe them....I am tired of these ********...they always want to milk money from people...I will never recommend them and will never ever consider a contract with them