Blocked toilet and tried everything to clear it

[Cfd]

Hi, looking for some advice.

My toilet is blocked. I've checked the manhole outside and it's fine. The only way I can get the water in the toilet to go down is with a drain rod plunger and when I flush the toilet, it fills back up again.

I've tried with the drain rod many times, I've tried washing up liquid and many buckets of hot water and nothing is working. There's no blockage in the U bend that I can feel. I tried an auger and couldn't feel the blockage either.

Any other suggestions before I call a plumber?

Thanks

[mileso]

do you have a inspection hole on you soil stack might be worth opening it but get a bucket ready just in case