OP sought a CL increase and his credit was pulled. Not only does this affect credit score, but the mere fact of increased debt may cause problems for OP if he is seeking a mortgage.

Maybe the first thing a decent mortgage broker tells an applicant is not to take on new debt from the time the application is made and closing (absent a genuine need and with a clearcut written explanation, e.g., "we needed new furniture for the house and took on an extra $5K in debt. Attached is the receipt from the furniture store."

OP should be mad, mad, mad. At himself.