Bad business ethics

I have been contacting Imperial hotel re outstanding payments from last year February 2020. I have used all means possible to get paid. They owe me R9150.00

I have emailed, phoned even spoke to their Banqueting department only thing I get from this department is 'sorry'

I have email Operations Manager Sandile Vilakazi, he just ignored my email never even once responded to my email, his email is *** I have also contacted Finance manager Michelle also not even a call backfrom her , her email is ***