What a horrible and unprofessional service I received from MTN Store

What an unprofessional and horrible service I received from MTN Store an Evaton Mall, Gauteng on the 31st of July and the 1st of August 2025. I went to cancel my uncapped wifi plan of R295/month and when I got there I was helped by Tumi Tsunyane whom told me she can't help me because the IME number on my wifi router does not match with the one on their database. I told her that the first router had a problem and I returned it to them and instead of fixing my router they gave me a new one without updating their database. Instead of being professional and calling the MTN helpline they have the nerve to tell me to the call while they sit there chatting as if it's my fault that the IME numbers do not match. The debit order with bounce tomorrow and it's the stores fault because I went there twice already without getting help. On the 31st they told me to come the following day as the supervisor will be present, which I did go but the supervisor did not still not present. I wasted my time and money for nothing. MTN is quick to sign you up but they complicate things when you want to opt out. I'm even questioning whether the new router was handed to me *****ulently. The people working at MTN Store at Evaton Mall are so unprofessional and they don't care about current customers. I no longer have money to go back again on the 4th of August 2025 as I've spent too much already. They don't care if my credit score gets affected due to lack of their professionalism. I'm starting to doubt if the people working at MTN Store at Evaton Mall received proper training before acquiring the job. I've been an MTN customer for years and I am disappointed at how they treat their customers, I am thinking of switching to another network provider