Shape from connected dots

Dear Forum

Using the follow me tool I formed a donut shape which is not fully circular; open at two ends. I selected the dots at one of the ends to close it but do not manage to make a circular shape from these oval arranged connected dots…

how do I build a proper circle with a surface and a middle point from the ovally arranged and fully connected dots? Or how do I simply cover the open wholes at both ends of my donut

Hi Jan,

Please attach the model to your reply.
It’s difficult to understand the problem from only a description.