After making it into the southern sector, i forgot to get malaria medicine, my symptoms got worse until i decided enough was enough. i went to do an underground mission and AFTER unlocking the underground safehouse and walking through the front door i keeled over and "died" of malaria. i was sent back to the doctors and was made to do the mission again, i went down to the bus station and traveled to the bus station that was very close to the underground safehouse. i saved and proceeded to make my way towards the safehouse. i killed all 7 guards again (i counted, one in a car on the road, 2 in an assualt truck patroling, and 4 guarding the house) i killed all of them yet the house wouldnt unlock and i couldn't get inside, i searched EVERYWHERE for more guards thinking that was the problem but to no avail. i eventually died again of malaria and reloaded my last save. i appeared at the bus stop and had to go back to the safehouse. i have done this 15 times and it has not unlocked. i have tried shooting randomly to draw a hidden guard out, i have tried burning all the brush, nothing works. Any help? Thank you

i was thinking because i had already unlocked the safe house that it wouldn't unlock again, hopefully im wrong.