This is general information and not legal advice. No attorney-client relationship is formed. This is for educational purposes only.
Do you now have some information about what the order of protection ("OP") says and on what grounds it was sought?
There are two avenues to pursue.
First, as soon as you can, probably Tuesday morning, contact the court where the OP was issued to ask for a copy and to let everyone you talk to know you were not served.
When you get a copy, which you can ask to have faxed to you, or if you don't have a fax machine, to a nearby copy shop, there will probably be information about what to do. There should definitely be information about any upcoming court date. You should attend, and if you can possibly afford it, hire an attorney to represent you.
Secondly, you can contact the CPS social worker who took your grandson to ask when you can see him and what you need to do to get him back. If you cannot get through to that person, ask to speak to his/her supervisor, and continue up the chain of command until you get to talk to someone.
Every time you call, clearly leave your name and number.
As much as it may pain you, present yourself as pleasant and helpful. For instance, if your grandson has favorite things offer to bring them to CPS to give to him (not expensive things, like electronics, as they'll disappear). Or, ask if you can bring him clothes and personal hygiene items. This usually gives CPS workers a sense you care mostly about your son.
Keep a journal of every call you make and receive and a summary of what you're being told.
If you have some idea of what CPS found that caused them to act so quickly, begin taking steps to remedy that. For example, you can enroll in classes, hire a cleaning crew, etc.
Can you call the pound to retrieve your service dogs?
Please let me know what other questions you have, all right?