Me, I got robbed thrice (three times).
"Thrice" is correct, but it is so archaic that it sounds silly.
they pointed down to the guns they toted half absconded (hidden) beneath their white T-shirts
"Absconded" means to flee, usually with valuables. Wrong verb.
I hadn't driven around the quarter (block? neighborhood?) than they decided (before they had decided)..
The word "quarter" meaning neighborhood exists, but I don't remember seeing it without reference to New Orleans in the USA or some town in France.
to park on the southside (south side)
"Southside" is used in the sense of "the southern part of the city". Otherwise, I'd suggest "south side".
They made me get out of the car and (go) into the shopping mall
from an ATM using my credit/debt card.
I'd recommend "ATM card". True, it's a debit card. However, it is called an "ATM card" if you are talking about ATMs.
I knew by the bulge of the guns they toted they had .38-caliber hand guns (handguns) and wouldn't hesitate to use them on me if I failed to do as told.
I don't think you liked this sentence, but I think it's fine.
some lonely, distant point on (the) BR-101 South expressway
Missing definite article.
They used a couple of broken bottle pieces of glass (suggest saying "broken bottles as weapons") as weapons
They actually leveled the pieces to (at) my bare neck.
"At" would probably sound better.
I also lost a golden (gold) watch to them.
A "gold watch" is a gold watch. A "golden watch" looks like a gold watch, but maybe it's made of colored paper, dyed chocolate, etc. (A "golden opportunity" is not an opportunity that is made of gold, something impossible. It is an opportunity that has the appearance of gold.)
A third (and last) time had me on a vicinal,
What the hell is a "vicinal"? I had to consult a dictionary to understand the word. I assure you that I have never heard or read it before. In Spanish, it is acceptable to use obscure vocabulary to impress the reader, but in English we find it annoying.
You tend to use archaic vocabulary. This is probably from your extensive reading. The problem is that sometimes the words are out of date and sound odd. Try to use the vocabulary you find in recent novels, newspapers, conversations with natives, etc. Your English is very good. You would have no problem living in the USA or some other English language speaking country. Good job!