I currently have a commercial auto policy for a food truck through...

I currently have a commercial auto policy for a food truck through Progressive. Their renewal is coming up in April and they are set up on automatic payments. They will be selling the business by that date, so we don't want the policy to renew. There isn't anywhere on the policy for me to process a cancellation. Does anyone know how I can proceed with this cancellation? I tried to call but I KNOW you all know how that went...an ho