We all have issues & complaints from time to time about different business.  The shops listed here on this site are done so because they have proven to be at the top of their game. Phone or e-mail is the best way to contact a builder. And understand that if you want to slam a builder that is a forum member, they have every right to slam back.

Check all grounds & electrical connections. Try a new spark plug & replace the coil and / or CDI with a known good one to see if it gets spark.