G'day Gordi, ( interesting handle!!)
As extra info, please see my other posts on the "30 day turn around limit"(which never happens), and what you may do IF it's greatly overdue, maybe with the help of a legal eagle.
In the current climate, you may expect 2-3+ months, mainly because of the thousands of Ven' refugees being processed.
I suggest that you get an official,current print out of what is required for your particular carnet....things change!! if that's tricky for you on their website, go to Migraciones in Brena and get a copy from their info counters....be prepared for a long wait.
Happy to answer any questions that I can, bearing in mind I did a Rentista visa, not married one.
Retired Aussie in Peru.