Remember the match George Soros v The Bank of England?
Even the BoE could not withstand market pressure.
As far as the Argentinean Peso is concerned, the 366 is a fantasy price. The real price is around 1,100 (for credit card purchases even above 1,200AR$) for 1U$D.
The 366 is the clearing price for exporters and licensed importers.
There's a lot of ground to cover until reaching realistic prices.