Can my mortgage company raise my payment due to their error?

Last year we had a bad storm in Del Rio Tx and blow some of my roof shingles. When I called my insurance company to put a claim they said I had no insurance due to non payment for nearly a year. I called my mortgage company to advise them of what I was told and she said she would verify. Well she called me back and told me she did not know how it had passed her not to pay for insurance. My monthly payment included the home insurance. Well they told me to look for another on due to the fact that the one I had did not want to insure my home anymore. I found one and did all paperwork, well know they are raising my payment due to insurance going up which I don't think that's right since it was not my error.