Homeloan Incorrect Mortgage

Account number : ***. I have visited the Nedbank fordsburg branch 3 times over the last two months requesting a full investigation into my mortgage loan. I purchased property in 2007 for 500 00 - I paid a cash deposit of 100 000 to the seller and took out a mortgage from Nedbank for 400 000. Today my mortgage on Nedbank systems show a mortgage grant of 550 000. Please could someone explain where the 150 000 additional mortgage came from and how in 2015 I am still owing over 450 000 on this property. I will be escalating this with the ombudsman within this week as none of the TCF or NCA has been app****. I will await feedback with written proof of where the extra 150 000 has been granted and interest charged to me over the last 5-7 years...I have proof of the mortgage registered by Dangor attorneys of R400 000...with my offer to purchase my property at 400 000 less my 100 000 deposit...Nedbank pls provide proof of where you have paid out the additional 150 000 rand of my mortgage to?????<br>