If your exchange is facing any such problem then why are you not contacting the online support of the exchange. Try to contact the online support people and tell them about your problem. Support will help you to find out why this problem is happening or why your win is being suspended. Apart from helping you in this regard, the online support will guide you in various directions on what to do or how you can complete the withdrawal. If you don't have the experience of contacting online support before then search on Google or YouTube by writing the name of the exchange from which you are facing this problem and you will see many related videos coming in front of you. I hope you can solve your problem by watching them.