Welcome to the community forum.
Did you follow a particular guide or something?
Just disabling Google Apps in the stock OS as if it was a normal setting can really mess up the functioning of the phone … but I guess you found that out right now.
Did you keep track of what exactly you disabled? That would help.
If you by chance disabled the stock Dialer (com.google.android.dialer), then the Lineage OS Phone 19.0 by LineageOS (Variant: September 21, 2018) Dialer was found to be a suitable replacement you can install, I’m using that myself.
For more on that, please see this topic …