Unity

I was praying this morning and I started to think about the church. I immediately thought about an inter-church event I had been to recently where a vicar had asked me what sort of church I went to. I said Christian. To which the reply was I was just being pedantic with an answer like that. Looking up pedantic, because I didn't know it off the top of my head, it says it means: punctilious - donnish - priggish - meticulous

I wasn't trying to be awkward or clever. I genuinely didn't know how else to describe the church I was in without resorting to silly explanations, and why should I need to?
It really disappoints me when I think of the church. There is only one. Only one body. Not lots of separate bodies, that is the Biblical view and if Jesus is to return that is the goal that must be attained.
I heard there was over 250'000 christian sects/denominations. What do i need to do to play my part in making it one?