Does anyone have any ideas on how to unblock a toilet??

We initially tried just using the toilet brush, no success..

Then he wrapped the brush in a tea towel and in a plastic bag, no success..

Then he used a bath towel and went for it, the water went down but when he flushed again it rose back to the top.

Hes now cracked it and said a plumber can come deal with it, great so in the mean time i'll have to hold on if i need to pee NOT HAPPY.

I had noticed it being rather weird, a few times when ive flushed its made a gargling noise at me.. strange..

Anyone have any more suggestions????