Profile information magically changes from time to time...

I am very loyal to Telkom and have been with them for 6 years now but this latest experience has really got me feeling upset and frustrated. Firstly I stopped receiving my invoices via email around June. I didn't change anything but the call centre agent I spoke to today told me that it was somehow automatically changed back to postal. Secondly my profile shows my second name instead of my first name which also changed around the same time but I only recently discovered it. I could not understand why the call center agents keep referring to me as Elizabeth. Thirdly I found out the hard way this morning that my residential address had somehow reverted back to one that I used about 10 years ago... Who changed all of the above? Do the Telkom staff play a game where by they choose a random client and then mess with their profile information? I have had to repeatedly give profile information over the years to the somewhat illiterate Telkom call centre agents. They seem unable to grasp basic concepts and I'm tired of having to deal with this.