technically it depends on the cryptocurrency that we are talking about. if it were centralized then it is very easily possible just like it is possible to block an a PayPal account. for example government coins such as Petro or centralized altcoins like XRP are in full control of their network. at any time they can block or even take any coins they want.

i have never heard the name of the coin OP has problems with though (ESK) but this is unlikely to be the case here. i suggest directly asking in the announcement topic of that coin or finding any other medium to communicate directly with the creators.