Contacted they in Jan 13 through website's Customer Contact Center. www.turkishairlines.com/en-tr/any-questions/customer-relations/index.html
"Thank you for choosing Miles&Smiles, the frequent flyer program which offers a whole world of benefits.
So that we can fulfill your request to match your membership status to Elite and offer you a truly special flight experience, we need you to send us the documents listed below. You can do this by checking the “Previous feedback” option on our feedback page.
A photograph or scanned copy of your membership card "Aerolineas Argentinas" that has minimum of 2 months validity (front and back) for your other airline’s frequent flyer program (the level of your membership must be at least Gold)
A statement for the same membership showing your flights for the previous two months
We look forward to bringing you all the benefits that Miles&Smiles has to offer."
Then in Jan 27:
"We’re pleased to inform you that as of January 27th, 2020, the status of your membership XXXXXXXXXXX has been raised to Elite. We’re excited to be able to offer you more benefits and advantages with Miles&Smiles.
There are a few details about your upgrade to Elite that we’d like to tell you about:
A 4-month trial period will be applied to your Elite membership. During this period, you must board at least one international flight with us.
At the end of the trial period, if you’ve boarded at least one international flight with us, your Elite membership will be extended for another 8 months (this means that you’ll have Elite membership guaranteed for 1 year following your status match).
In the first year of your Elite membership, if you earn at least 15,000 Status Miles through international flights with us, your membership will be extended by 1 more year (this means that you’ll have Elite membership guaranteed for 2 years following your status match).
With your Elite membership, you’ll be able to take advantage of a host of benefits to make your trip even more special. These benefits include:
Entry to our private passenger lounges
An additional baggage allowance of 20 kg on all our flights
Priority check-in and priority boarding
Passport control Fast Track
More Status Miles on your Business Class flights "