What treatment will heal ruined tissue from using the FaciaBlaster?

legs need RF treatments regularly , Sculptra for collagen production, and microneedling RF like deep morpheus8 to get improvement. you may need thigh lifting as well. this result you are describing is likely from aging and not from the facial blaster and internal hormonal therapy maybe also needed. please see an expert.As we age the skin sags there is  nothing  you can do that but try preventative  energy-based or thread-based  treatments or get a neck/facelift earlier in the aging process.  There are numerous options and some can be used in combination to get best outcomes but you need a consultation with an expert.
Options include for skin tightening :
thermage radiofrequency to heat skin and tighten it over time and prevent the aging process
ultherapy highintensity ultrasound to contract muscle and tighten the face and neck and prevent the aging process
PDO nova threads or instalift threads for immediate lifting without surgery and long term collagen production
sculptra injections for collagen production to areas of the face and neck with crepe skin or early sagging
btl exilis ultra, venus legacy, thermi250 , or inmode forma/contoura  for constant collagen stimulation monthly with facials
facelift/necklift with fat grafting/fillers if you need a big improvement
ThermiRF or J plasma /Renuvion or Inmode FaceTite   internal heating and tightening to long term internal heating and tighting with or without surgery
Platysmaplasty to tighten the muscles of the neck long term and create contour
Facial implants or fillers to contour the jawline and chin to improve the apperance of the nec k
Fractora/Morphenus8 or Intensif microneedling RF for improve superficial tightening, neck and chest wrinkling and crepe skin 
You need to see an expert in facial sculpting and age prevention.  Best, Dr. Emer.

Skin of the lower body can be treated with multiple modalities in order to restore it to a younger appearance. Radiofrequency with or without microneedling and laser both tighten your current skin and stimulate new collagen formation similar to younger skin. You may just be noticing age-related changes rather than direct results from the FasciaBlaster. Hope this helps!
Johnson C. Lee, MD 
Board-Certified Plastic Surgeon