WORST SERVICE EVER!!!

I have tried sorting this out for some time. was paying MBD and at no point did receive a notification that i over paid and made and enquiry. I overpaid sent in my details 18 Feb 2015 and was advise 7days for refund. got a call advising it will be 21 working days. Followed up and was advised only started on query 25 Feb 2015. Sandra Prinsloo never returned call despite request. Called and Flora now say payment next week.despite 21 days finished 25 March 2015. Ask to speak to Sandra WHO HAS ABSOLUTELY NO PEOPLE SKILLS. TELLING ME \LISTEN LISTEN HALLO""