Unhappy Client

I have been an MTN client for more than 30 years,Every 24 months I renew my contract get a new device we move.My contract was expiring at the end of April 2026 for the years I have been with MTN they wait for me to call or walk into one of their outlet before renewal.At the end of March 2026 I noticed the premium increased I called to enquire the reason I was told my contract has been renewed.I asked by who and where did I sign for the new premium and where is the new device as per usual.The response from the Consultant was someone will call me back.The someone who called me back said I understand you would like to upgrade? I said please go back and check my enquiry I had subsequently followed it up with an email.I am still waiting no one has reverted to me.I asked the response to be on email reason being I cannot take calls during the day most of the time.I would like someone to revert back Regards