Why do I have multiple active sprints? How do I delete them?

[JK]

So to start, we have never had the parallel sprint function enabled.

But we seem to have multiple "active" sprints on our drop down down.

When I go to one of those sprints via the link on an issue, it goes to the current sprint in a different name.

I think we may have made these in the past, but deleted them, as it was when we were first testing the system. so they are stuck there forever as active.

How do we delete them to tidy things up?

[JK]

IS there anyway to contact support to get this resolved? 

It seems like a Bug?

[JK]

So I'm not sure what to do, when i try and go to support, it says that I should post on the forum, but if the forum doesnt have an answer, how do I contact support?