The point of this accusation is about fake volume and liquidity, Op can't sell crypto because it always faces error orders.
If you tell us what crypto you are trading there, we can assume it makes more sense. Generally, cryptos that are only listed on one exchange are likely to be manipulated. This is a common behavior for any shady exchange.
Edit:
After losing a pretty good sized position at a cost that was not possible I had noticed my buy in position was switched to a price that could have not been possible since Bitcoin had not achieved it yet and wouldent got another day or 2.
If you are trading bitcoins early on and they switched the price of your order, this is clearly liquidity manipulation. But there is an easiest solution to solve your problem, just withdraw your bitcoins and leave the exchange immediately. At least you didn't lose your bitcoins.