Flexible connector not sealing around a new toilet outlet.

[gordonbell20]

I fitted a hew toilet which was fairly cheap. I cannot get the flexible connector to seal around the toilet pan outlet.
The outlet seems quite short, is not glazed and the connector just wobbles on it.
I have tried "packing "out the seal with plumbers mate but this doesn't work.
What should I do. Try anther connectir or send the toilet back?

 

[Rtplumb]

Any chance of some piccys of the problem?

 

[gordonbell20]

Hi,
I think the problem may be that there is a raised seam extending from the u bend up on to the outlet right to the open end. My understanding is that the outlet should be smooth and preferably glazed.
Do you think this is the problem? In the pic the outlet is at the top of the picture, the U bend at the bottom.