Complaint Review: Rainbow Movers

I have a nationwide delivery service. I did several deliveries for Rainbow Movers. I have no complaint about the work. In September 2018, I made a appliance delivery in the Boston area, and did not get paid. I have sent several emails, made several calls, and also sent letters, and they are all being ignored.

I have made several attempts, and no reply. My company partnered with Rainbow on several jobs, and for some reason I have not got paid for this job. I have no ill fellings, just want to be paid for the work.