A while ago PWO has gone from using XanaScript to Lua for the coding of NPCs. NPCs on maps that were no longer accessible weren't included in that update unfortunate for you. The [name of the map you're stuck in] were part of the [name of the event that map is from] event which has resulted in you being in the current situation.
Normally the you'd resort to the following steps:
But presuming the last Pokemon Center you visited was on the event map as well, you can skip step 1 and 2 in this case and try contacting a Staff member right of the bat.
- Use an Escape Rope
- Lose a PVP battle
- Contact a Staff member
The easiest way of finding staff members would be through the Discord chat. I hope this issue will be resolved soon.