No service

We bought a property last year October, we have experienced grate difficulty with paying the installment where we had to cancel medical aids , insurances and ens. We contacted Yolanda 3 months ago at the CEO office where she responded that we haven't skipped a payment and there is no concern. We recently founded out that they made a mistake on the vetting by missing expenses. I have emailed numerous times where we get the response that we signed and it our problem. i have emailed senior people at ABSA where they do not bother to reply. What should we loose all our saving of R40+ and monthly installments where we walk out with nothing , and ABSA are not interested to assist.