Worst service

I have had the worst experience with mtn the last year.

I took out a pay as you go router from them in Sep 2023. Paid a deposit for it. I returned the router to another store in Nov 2024 when I took out a 12 month black Friday contract with a new router. Until today I am struggling to het the deposit back for that router as the store where I returned it says I must ask store where I got it from originally must log a ticket and store where I got it from says store where I returned it to must log a ticket....

Fast forward to June 2025 I had to return the router on contract again as my area had no coverage where I moved to. Again same story..... No refund of router, store where I returned router says store where I got it must log a ticket and store where I got it says store where returned it must log a ticket.....

Both contracts were on pay by 1ste or be cut off. So the last one I paid 25th May for June. Couldn't use it since 2nd of June due to moving to new area. They debited me via stop order again 25th of June after stopping the contract on 9th of June which I couldn't reverse as it's a stop debit order. So I asked my bank to put in preventive measures to avoid it from happening again so they put a "dispute" in. 25th of July mtn debited me again, luckily I could reverse it....

Mtn has been sending me in their own words "piller to post" and not resolving the issues.

They keep on telling me there is now credit due and because I reversed last debit order,I still owe them 3x my debit amount.... how can that be if only last debit order was pulled back after 2x ******* debits? Then I could have finished by contract normally by end of November.....

I have spoken to prepaid, contract, retention, legal, accounts and Mondo. Nothing helps....