Search engine optimization

My name is Shaun. I am a "we buy houses" company in Denver.
4 months ago I had a number of top 3 spots for great keywords such as "we buy houses" and "sell my house fast"

I went through a litany of issues that I thought had been corrected but now I am stuck in 4th place for a bunch. I have friends that recently used SEO Expert advice and shot from not even top 10 to top 3 in a month. Serious results indeed.

My website is watsonbuys.com

I am looking for some help to get me moving in the right direction again - i.e. I need to rank number 1 for sell my house fast Denver, sell my house fast in Denver, the fastest way to sell my house in Denver, etc.

Thanks for your time. I look forward to hearing from you.