I also used my UAE credit card to purchase something one and half year back and after that I lost my job and went back to India.
The agents from India /UAE are regularly threatening me. Please note that Legally, nobody can touch you in your hometown.
But, if you enter the country from where you took the loan, you may face the problem. But you can migrate to any other country without any problem. ( As there is no information exchange system in between GCC countries, till now). BUT DONT GO VIA THE COUNTRY WHERE YOU ARE BLACKLISTED.
But my sincere advice is, try to come out of your debt. Try to negotiate with the bank to reduce the exaggerated amount and ask for installments . Pay it off and get relaxed.
'ALL ' BANKS ARE REAL ROBBERS AND NEVER FALL IN THEIR TRAP. KEEP AWAY FROM THESE BASTARDS.