stuck

Hi all, i have a leaky tub we never used since buying the house and decided to change the cartridges. The Right handle cartridge was replaced easily. Of course it wasn’t causing the leak. When I took off the left handle I found this. I can’t get the cartridge to turn at all, most tools won’t...

The title pretty much says it all. I've got a bathroom sink that wouldn't drain. After working on it for a bit I realized it's connected to a double kitchen sink on the other side of the wall. I've suck 'em both with the wet/dry vac, I've plugged and plunged 'til I was blue in the face (and...