MTN SHOP 154 EAST RAND MALL - BAD SERVICE

Shop 154 East Rand Mall I took out a month to month unlimited speed / uncapped contract on a MTN LTE router on 10 August 2024 at the above shop. I return it on 16 August 2024, since the max speed the router output had was 5Mb/s at my house. I cancelled the contract on 16 August 2024 at the shop, and I found out today that the paperwork was never processed by the shop. I payed R1700.00 (router) and R150 (Sim card) when I took the router on 10 August 2024. I handed the router to the shop on 16 August 2024 as part of the cancellation, and I was told that the monies I paid will be refunded to me, because I cancelled in my cooling down periode. But today I am told the monies are not refundable. The manager is not available to talk to me, she was not helpful at all on the day I cancelled. MNT retention department can't assist month to month contract clients so I am left to deal with the point of sale store which are misleading me and giving all excuses not to assist me with this. What do I do now??? IRMS*** Jimmy @ MTN store 154 East Rand Mall. ***