Every order whether ionterim or final can be challenged. Its a different thing as to whether that challenge succeeds or not. Interim orders can be challenged in your case by filing a revision of the said order before the competent court. The success of your revision Petition depends upon the grounds you have taken in the said petition.
2. if u do not pay the maintenance as ordered by the court then you may even be put in custody and punished for default. So better way to get out of this situation would be file a revision before the appropriate court and try to obtain a stay of the operation of the said order.