Harassment

I can't believe thati have a query again regarding lewis services, I had query that they resolved and now they are creating another query for , there is an arrangement in place to debit the account on the 29th August has gone off but today, lewis staff from Palm spring decided to come to our house today harassing us about the payment, Four people came to my house including whites and left my mother traumatized, I want to know why there were in my house and if there are issues why are they not calling instead of behaving so unprofessional, I really do not appreciate this may this problem be resolved immediately.