Compost differences

I have submitted a query to Homebase regarding the first lot of compost that I bought from them. I'm willing to give the other bags a go, but I won't do it at my cost. I've lost probably £15 of seeds that haven't managed to germinate in that compost, and over a month of sowing/growing time.
Even the stuff I've put in that compost that were established plants are showing really worrying signs of distress, so I've repotted/replanted everything into the newer compost that I bought.

Compost should be fit for purpose whatever it's made from, or what brand or make. What I got in the first couple of bags that I've used isn't good for anything but the lawn possibly.