We had to get a new motor also. Whoever arranged the garage door tradesman to do the work at your unit block should have been proactive and collected the existing remotes from residents to be re-programmed to the new motor once it was installed, and then given back to the owners/residents.
Our OC purchased 12 new additional pre-programmed ones from the garage door people to be sold by strata, to people when required. This saved the call out fee charged every time the tradesman had to come out and recouped our money spent on new remotes which went back into the bank. I wonder what your people are now doing to access the garage if they do not have a newly programmed remote. Since it is a past event in your case, I would enquire from strata if everyone else has had to pay for their remote or some i.e chairman, have obtained freebies. If you are a tenant, I would keep the remote when you move out as it is your property and indicate to the landlord that they have to buy it from you if they want it back. Make sure you get a receipt from strata.
The intercom issue depends on the reason for the fault. Was it vandalised or sabotaged in some way? Why is it now not working when it used to?