Bro, try mo Shimano cable, like the ones they use for mountain bikes (brake and shift cable). Matibay at recommended din ng mga power window technicians.

Pareho lang kasi yun ng mga power window cable. That's what they used sa power window ko, kasi madalas magbuhol-buhol before kaya napigtas eventually. More than 2 years na, ok pa rin. Tapos, as preventive measure, apply silicone grease sa run channel para madulas.