Never open this ****ty account

I am exhausted of this ****** retail shop.. This nuisance has been going for months.. Firstly I was billed for a Sim I did not agree to.. Then also being charged for plan that I have been begging them to cancel over the years.. I settled the ****** account 5 months ago and have been asking them to close my account which is also taking them 2 months to... I want this ****** account closed and my refund processed today... They told me I needed to go in store and complete a closure firm which I did and I had to go back and ****** submit a copy of my bank statement.. Months later the stupid account is still open.. I have never seen such incompetence from a store.. If I knew that closing this ****ty account would be such a hassle.. I called through the call center and spoke to some stupid agent that insisted that I should email her my statement on the 06th of November 2018.. Which she promised that the account will be closed by the end of the week and it wasn't.. She gave me an email address ********** to email my docs.. Still no reply from her.. Only 2 weeks later she responds and tells me to send my mail to service ********** I received a response with this reference cid1ct4tzc2c6qlb8x1kc.. Till today no feedback.. MR price is ****** useless.. I need advice on how I can take this matter up and deal with this ****** retail shop.