Should I challenge a trade?

Hi

A simple query. Few days before while trading , I lost quite large amount automatically in a platform without proper explanation. Later I was told that my position has been closed by interbank liquidity provider even though my account had margin balance in that.

My query was - Can I legally challenge closing my position because of issue between Interbank and my broker ?

sounds like hard work

If you're posting this, that's enough incentive to challenge it. You have nothing to lose and you can always change brokers.