Hello again, Andrea.
This would typically involve a breach of contract for which you could pursue damages against the contract since they deviated from the agreement you entered into. It would not likely constitute a deceptive trade practice under Chapter 93A though unless there was an intent to deceive you. If the contractor was mistaken that the foam would be better than the materials agreed, that would not normally involve a violation of Chapter 93A although there would be a breach of contract claim involved since they did not use the materials agreed to.
You would normally be entitled to the reasonable cost to install the materials you had originally agreed to. If the contractor will not agree to a settlement of your claim, then a complaint could be filed with the BBB or the local or state consumer protection agency
Here is a link that provides guidance on pursuing a complaint against a contract with the local or state consumer protection agency:
I hope this helps clarify the situation for you.
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