Suspicious transactions on my account

I took a Sanlam personal loan in 2019 for a term of 48 months. I have just notice my statements that the loan term was amended without my knowledge. In 2020 it changed to 60 months and by the end of 2020 it was 72 months. Recently it has gone up to 84 months. Even my address was amended without any communication or notice.

I have made numerous calls to no avail. As soon as I enquire about this the consultants hang up. I need clarity on this. My contact details are : Miss RS SHEZI ***