Change the spread

My account is 699089 and my name is Huang Yong. I opened an account through KVB Kunlun International before, and later said that KVB Kunlun International withdrew from the Chinese market, and then transferred all the funds in our account to KVB Prime. During the period of trading in KVB Prime, and recently discovered that KVB Prime is really too dark. When a customer opens a position, it will expand the customer's spread, and when the position is closed, it will expand the customer's spread. As a result, the profitable orders have made less profit, and the losing orders have lost more. The spread will expand in an instant every time a position is opened or closed, and it will return to the normal state after the position is closed or opened. Probably every time after opening or closing a position, the customer will have to lose more or earn about 3 points less. If the customer trades 1 standard lot, at least $30 will be swallowed by the black platform of KVB Prime. What's more ridiculous is that when we reported this issue to KVB Prime via email, the official reply turned out to be ridiculous, saying it was normal. Then my friend contacted the account manager. The account manager’s reply was also ridiculous, saying that there would be good news, but after 1 day, the account was returned to the normal state. When I contact the account manager myself, the account manager does not reply.
Others are not retroactive. Starting in 2021, a total of about 500 lots will be traded. Based on the calculation of one lot hacked by KVB Prime by 30 USD, KVB Prime is now required to return 15,000 USD.