i had the same a few years ago, i jumped into a tuk tuk outside MBK and the guy offered me the same deal. 50 baht to go to a rather filthy looking indian tailor shop. i did order a pair of cargo shorts made to fit, but obviously didnt spend enough , when i got to central festival where i was intended, the tuk tuk driver tried to scam me for 500 baht.. i gave him 200 baht and jumped out, walked away.. i always use Bolt, now, every time. never a problem, never been scammed,,as for the cargo shorts, they turned up at my hotel and not what i ordered or the material i asked for and too tight..