How do I tighten the skin around my face please? Is there a cream I can use or exercise I can do please?

Retinoids. Topical retinoids which require a prescription can help remove fine wrinkles and smooth your skin. Laser treatment such as co2 resurfacing is a bigger procedure but works well. Chemical peels and ipl (intense pulse light) treatments can also help.
Holy grail. Skin tightening is one of the holy grails of aesthetic plastic surgery. Generally we tend to accomplish this via skin removal and pulling (nip and tuck). Other methods such as creams, peels, lasers, ultrasound, radio frequency may be able to accomplish minor deftness of tightening with claims of 10-40%! made by manufacturers. Retin a (tretinoin) remains one of most effective topical anti-aging skin regimens.