MBD refuses to provide paid up letters

I would like to state my dissatisfaction at MBD who hounds a person for payments but when you settle an account they refuse to send you a paid up letter or respond to your emails, consultants pretend that the company is so big that they do not know who is who in that place, i have settled my finchoice account over a month ago and have yet to get my paid up letter Melany Kathleen Freeks from the administration department keeps sending generic emails requesting my id number and when i respond there is dead silence, i have laid a complaint with the ombudsman as i am now getting calls from other collectors requesting payment for an account that has been settled a while back.