Deficiency of vitamin D. Consultation.

Hello doctor ,i m rittu sharma i m talking on the behalf of my mom.. my mother is suffering from deficiency of vitamin D, before 40-45 days she had a test and it was 7.1 unit , and she is going to weak day by day, she feels very tired, due to lockdown we could not go for a better treatment , i m very worried about her health, we need ur help.. plz help what should we do for doing her well ... one more prob is that 2 months ago she got hurt by a ball at the calf area of her right leg , and she is having a severe pain till now, she could not sleep even for continue 1 hr , she is having a pain from her thigh to toe... we are feeling helpless for her... plz plz if possible i need ur help.. i m ready to pay ur consultation fee too .. plz doctor i really need ur consultation... thanking u... plz help my mom to get rid of her pain...