Before executing a trade in any p2p platform, there are several notice and warnings including videos and disclaimers on how to use the services. Part of the core message is usually to ensure funds are received before crypto is released. Anything contrary to this sequence,  there is really little the exchange can do to help as it will be difficult to prove funds were not received. 

Following instructions and being cautious is the sure way to survive in the digital world because where there is ease and comfortable is where risk creeps in.