I would like to amend my review from 5stars to 0 but unfortunately I can't have that option

I would like to amend my review from 5stars to 0 but unfortunately I can't have that option. First they tried to do the process fast and easy but then made some minor mistakes, I can live with that but once the customer tries to correct them now they take their time to fix thier fault and are not communicating as they should regarding their mistakes and keep their customers waiting long that needed. Management has to be more at the office. Keep on asking for management with only to find out that they are on leave what a sad company. Explains why the staff can't do their jobs as they should