Oh yes, I would like to hear how you go on with the chicks. Why not go back to the garden centre and say you had no eggs hatch at all. Perhaps suggest a goodwill gesture of a voucher or free seeds or something? No harm in asking, and really you deserve something. Are they eggs from the garden centre or some they have bought in I wonder?
My latest hatch the bantie has got 5 - definitely seen 5 - chicks out of 7, so you see, you should have got something out of your eggs too.