Bad service

I received payment relief on my car finance for three months as I was retrenched.. one of the payments was refunded twice and my account went into arrears. I then paid the arrear amount and all was in order Wesbank then increased my monthly installment even though the new agreement signed was not for an increase in installment They have now sent me my latest statement showing that my account is in arrears again . They don’t answers calls . Or emails .. they don’t care about your credit rating .. unacceptable service