OT but do you r'ber the salon name where you did it in MBK? There is an entire building of hair salons at Siam Sq which might have better salon? I wanted to get my hair done there but never quite dare to. I always go back to my reg stylist where I am.
KMS has a good de-frizz treatment cream but I think it works more for straightened hair. There is this brand RPR from AUS that has good leave in mois to defrizz. Do you get that anywhere near you since you are located in Sydney?
Don't bother with MBK if you're in Thailand, there's actually an amazing place called Wasabi on Thonglor that I love! I got my perm there and I love it. Best of all, I don't know how she does it but my hair is still soft!
Her name's Sumiko (she speaks little Thai but enough to get your point across - all the stylists here are Japanese I believe). Haircuts from her are 1000 baht, and my perm was 3400 baht.
My hair was bra hook length and very thick! Total process from sit down to leaving was 2.5 hrs.