Update on my recent attempt for status match with TK.
I have submitted an online feedback form detailing that I wish to get matched from BA Gold and Virgin Gold. I stated that I recently (few weeks back) completed a flight with TK.
They came back and asked for membership card with my detials on it and my recent (past 2 months) flights statement. Which I provided in the feedback form as attachment. Also asked for a copy of my passport.
After all these they have granted the status match to TK Elite for 4 months, and if I take a TK flight within the 4 months period, I will be granted for further 8 months (one year in total).
So it's a success. Thanks all for your help, tips, and guidance.