I need a professional poster and a professional flyer made

I have an aesthetics company called SlenderCool. It is a company specialising in a weight loss treatment called cryolipolyisis (commonly known as fat freezing). This treatment uses suction and cooling to destroy fat cells.

I have had a logo designed for the company, which is fantastic. And I am now looking for a eye-catching poster to be made for Januarys fitness craze and a flyer to go alongside it. I have designed a poster and a flyer myself and have had them printed. I am looking for someone to take what I have created and make it more professional and eye-catching. I am very happy with my logo and colour schemes, so I would want everything to in keeping with what already exists.

I need this to be completed very quickly. The latest by 27th December (1 week project).