Debt collection from uae

Dear Sir, I used wok in Saudi Arabia 5 years back and had a personal loan from a bank. The loan installment has been deducted on monthly basis from my bank account as my salary from company has been transferred to the same bank. I have paid regularly and for at least for 3 years and on the 4th year I had exited and the company had released me. It has been 5 years since i left saudi arabia and recently i received a call from UAE and the caller claimed the he is calling on behalf of the saudi bank from UAE and asked if I have worked in Saudi and I said yes. And he said I have to pay a big amount to a saudi bank (he claimed teh total bank loan I got) but i said i already paid 6 years back and i returned back due to employment problem. He was harsh to me and said you have to pay full amount all again. I said I have already paid and the the company sent me back as they have sold the company to new investors. Im in India working in a company. He has called my employer in india and told that he is friend of mine and got my mobile number from him and now started to call me every 5 minites. I said I have nno money to pay you anything and as I have no proper income. They he somehow found my wife's company number and started calling her tarnishing her wok environment. The number he calls is a UAE mobile number. WHat shoudl I do.. Pls advise...The loan I took is an Islamic Loan. They should have waived it as 5 years gone..