You havnt stated what your intended use is ?
Occasional internet, low calls , streaming movies, talking all day etc etc.
Do you intend on returning ?
The more info you give the better the advice.
The standard of living enjoyed by many here is far better than they would ever have achieved in their home country.
The positives here far outway the negatives for most. Its also fair to say that the country most have left actually no longer exists as it was when they were resident and is consigned to history and memories.
Has all kinds of uses beyond the obvious.Entrance to some parks at local price not tourist.Useful ID has many applications, if you can get one do it, it does no harm sat in your wallet but may well come in very useful.
Simple , either say nothing and hang up, or, you could tell them, You know my name and address (from the package) put it in writing , send EMS and we'll go from there, goodbye !
At 62 you got a much higher chance of a real serious problem by engaging, than by simply diffusing or removing yourself.
Dont ever let your ambitions over rule your capabilities ????????