WORST SERVICE EVER!!

I found out that I have been debited for a non existing phone for about 11 months , I then contacted Cellsure last year March 2020 to arrange for a refund . 10 months later i still didn't get assistance. Every time i call its either they leave me on hold for long or they just come back to say the matter has been escalated , for how long ??? I have sent numerous emails and still no assistance. This is by far the worst service i have experienced from any service provider .