Hello, welcome to the website. My name isXXXXX can assist you with this.
If there has been a miscalculation on their part, you do not have to pay for the work at all if they are refusing to do it for the price areed.
Was the work to be done under a government funding scheme?
Okay. They have to agree to do it for the agreed figure, unless their terms give them the right to change the price within defined parameters.
Do check their terms but I doubt they give them the right to do what they're proposing. It's somebody else's mistake ultimately.
They have to honour the agreement they reached with you, yes. They cannot, at the last minute, say they got it wrong and that it will cost you extra now. You can either agree to pay the extra (and be done with it), or require them to do the works at the agreed price, or tell them to go away and forget it.
Is there anything more I can assist with?
Thank you! Hope it resolves.
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