My experience of FinchVPN has not been a happy one. First, I could never get it to work with my Linuxmint-18 (Sarah). Second, my android phone connects with Finch and the connection lasts hardly a minute!. On one particular day the connection really held on but the speed was just about 200KB.
Sorry to hear that you have problems with service, but without providing technical details about your setup (and plan which do you use - free or paid) nobody can help you to solve the issue. If you use free plan I recommend to switch to another VPN provider, in case of paid plan I recommend you to use Email or Ticket based support.