Wrongly Billed

This company is getting worse everyday..Last month we were locked out because they had said we didn't pay even after we paid and sent proof of payment several times to them. Now they billed us double because these ******* didn't record the bill we paid...this is is just ridiculous. Why deal with property when you can't even manage anything properly..AFCHO you are unfair to you clients and one day you will get what you deserve