UNBLOCKING A WC
The correct tool to unblock a toilet is a cooper’s plunger — a plain rubber disc on the end of a T bar — NOT a plunger with metal disc, which would damage the pan.
You can get by using a conventional sink plunger, though this will not be the right shape to create full pressure — it can only force short, sharp surges of water through the trap to clear the blockage.
If you haven’t got a plunger. An ordinary household mop is a good substitute. Or you could try wrapping a toilet brush in rags and then enclosing it in a plastic bag tied with string. Use both as you would a plunger.