Hey Google, I'm Not That Sheila Lamb!

Question: I need help with my Gmail account. My email is sheila.lamb@gmail.com and someone in the UK has evidently set up an account as sheilalamb@gmail.com.

I'm getting a lot of this person's emails. She evidently does a lot of online shopping and I get all the email confirmations. So I can't help but wonder if any of my emails are going to her. I've tried to find someone at Google to contact but that appears to be impossible.