Disgraceful service

Absolutely disgraceful service received from Skynet worldwide express - have been dealign with them for 10 days on an invoice which was exorbitant - eventually they provided me with the workings and it was noticed they had overcharged me by R900. They advised that it was very difficult to adjust the invoice they had already issued me and couldnt really do anything ... I tried numerous times to escalate this and eventually was told as i hadnt paid the invoice ( the wrong amount) my goods were returned. What a total disgrace - *****ing money from customers. Poorly run with useless managers and customer service. Utter and total disgrace