scheduled way over my desired hours

back in january i set my desired hours as 20. i understand the “goal” is to schedule team members within 20% of their desired hours, so for me that would be a range of 16-24. each week varies, some fall within the range and some don’t. the next three upcoming weeks are all OVER 30 hours which is way too much for me. believe it or not there are actual reasons why my desired hours are 20, i didn’t just put a random number. earlier this week i talked to my TL about it and he said he would talk to HR (they’re the ones who make my schedule bc i don’t have an ETL). the day after he confirmed that HR said they would “look into it” but nothing has updated. i’m not able to speak to HR directly bc they’re always gone before i get there. i’m not sure what to do. i don’t have enough PTO to even cover one day. i could try posting some shifts, but they’re likely not going to be covered by someone. i need a way to reduce my hours for sure. i’m feeling very frustrated and lowkey taken advantage of since i have open availability. i may be technically available all week, but that doesn’t mean i don’t have other responsibilities that take up my time too. again, there’s a reason why i set my desired hours the way i did