Its over two weeks of looking into my quirie

I am struggling to get assistance from telkom direct store visits as well as their technical support.For the past three months my phone has been showing pop up screen with the words"unable to identify sim card",it used to come and go then pop up again after two day,but now i see that every day three to four times every hour.I visited telkom stores" Wonderboom store "(08/11/2023),"Wonderpark store(09/11/2023) & again on the (10/11/2023) "only to be told that their system is off line on all my three visits.I was then told that i should find myself another phone to call Telkom Internet Technical Support and explain my problem to them.I even tried to remove the sim card then replace it again but no positive results. Funny thing is when i buy recharge voucher it goes through but immediatly when i try to make a call, voice prompt tell me i have insufficient funds,my last three recharge dates of R100 each were during 17/09/23 then (5/11/23) & (09/11/23) i could not dispute this since i was too bussy at work. I have written e-mail requesting assistance since i also suspect that my phone number might have been allocated to someone else,i indicated my fear that both my work and private OTP's might be dellivered to somebody other than me. At times i can't even access cellphone banking.Recently i was informed by both friends,family and colligues that most of the times when they call me,my phones reports when the subscriber is unavailable.I had already written e-mails to (http//:apps.telkom.co.za/logafault) and the response was to give 24 hours for feedback its now over two weeks still no feedback.