Yes, the shares you have offered for sale can be delisted, adjusted and relisted at any time up until the point another customer opts to buy them i.e. if you list them and someone accepts that price and acquires the shares the transaction is complete and you cannot unwind that transaction.
Don’t invest unless you’re prepared to lose all the money you invest. This is a high-risk investment and you are unlikely to be protected if something goes wrong. Take 2 mins to learn more.