Recommend a good dry cleaner for French Connection dress.

I need a good dry cleaner in the South Dublin area, used to cleaning FC dresses.
I've had my worn once, bright coloured French Connection dress, dry cleaned unsatisfactorily in Rathgar. They offered to clean it a second time but it came back no different. I complained and now they are offering a 3rd time.
There are drink splashes/stains on it but some of dress is now slightly discoloured.
I treated myself to this dress, knowing it is delicate. However, as I thought they are so popular and available every season, it would be possilbe to get them dry cleaned properly.
I have read older threads about such matters, and would reluctantly go back to the retailer. The beading around neck is fine, it's just the colour and silk material of the dress. There are specific instructions on the label for the dry cleaner to follow.