Umexplained increase in homeloan instalment

Be carefull of amounts that nedbank charge to your account when you take a loan with the.They increase instalments and can not even give you a valid reason why instalments are so high.2 weeks of calling and we are being taken from pillar to post trying to rectify transactions on our account that are wrong..The call centre staff in the homeloan deprtment and insuramce department are very ***********