I have two Delphinium plants purchased about a month ago from a local garden centre which seem to be diseased.

They have been under attack from slugs but think I have controlled the slugs now with pellets and beer. Maybe too late.

I have kept them well watered, also put down some home composted mulch, which may not have been a good idea. I am a novice gardener and the compost may have been diseased.

and I am not sure of the diagnosis. I have read about Delphinium blight, but this plant has been in this condition for a couple of weeks without actually collapsing.

Should this plant be uprooted?

Can I get a refund from the supplier if they are this badly diseased?

Many thanks