¿How can I eject a VHS stuck tape?

I put a vhs tape in a JVC HR-J6002 UM and it plays and records but will not come out. Every time I try it sounds like it is in the process of ejecting but it does not and turns off. I have tried with the machine standing on each of every four sides and up side down, even gently shaking it.
The machine used to work without fault and I suspect it was probaly a defective tape since it was the first of a new box.

Thanks for any advice to solve this problem.