If it was issued for two years, then proof of service was provided to the court. he also admits to NOT attending the hearing ... ouch for him.
Most courts are not going to entertain a motion to vacate the order without something new. he had his chance to contest the order, but chose not to go.
But, yes, he can pay a lot of money for an attorney to file this and that, and maybe even get a new hearing. But, the odds of it being reversed is slim.

