INSTALLMENT INCREASED WITHOUT SOLID EXPLANATION

To my surprise i get a letter from Nedbank stating that my instalments on my homeloan is increasing. Letter date is 14/03/2016 STATING \following recent transactions on your homeload account...\" What recent transactions Nedbank? <br> <br> On the letter itself states that if any queries i should call ***which i did...after holing 11 min on the phone explaining my query to a lady, my call without being notified gets redirected into the new calls Que and i get transferred to another gentlemen. Now I have to explain myself all over again...another total of 24min on the line and my call gets dropped...WHAT?? No i need to call again to find out what is the reason for the increase on my instalment as I believe Nedbank is increasing my accounts without proper notice and explanation of the actual reason!!!<br> <br> I find this unprofessional!!! <br> <br> Also to this, I have made extra payments on my account which does not reflect. I have called in nearly a month ago and loged a query. I was told to email the Proof of payments but to no surprise did n get a respond. "