51, weight loss caused crepey neck - what is the best treatment option? (Photos)

I am 51 uk based and lost over 3 stones about 6 years ago. My skin where the fat was under my chin did not bounce back. It is very crepey and bothers me the most However when i smile the crepey skin is not visable. I am not an easy case for surgery because I have a hereditary bleeding disorder Called Thrombocytopenia my platlets are around 45. I also have Hypermobility so everything is stretchy. I have had Botox and fillers with a canula which did cause bruising but it went. Bigger surgeries i have needed transfusions. I dont want something that will last 6 -12 months. I am happy to consider one stitch procedures or laser or any others. Pkease help me by suggesting what you think would work best Thank you