ONLY a few investors returned to the Central office of EGI International yesterday as the alleged scam continued to unfold. The doors were locked and there was no evidence of staff. A notice asking investors to lodge any complaints with the Commercial Crime Bureau was posted outside the 29th floor of the Two Exchange Square office. One of those who lost money, Miss Chan, had given up hope of getting her $150,000: ''I know that it is quite impossible to claim my money back. I have no hope at all and there are too many creditors.'' Miss Chan had invested $150,000 in the company for three months with a monthly profit of $3,000. Like many other victims, she was introduced by one of her friends who said the company's headquarters were in the United States and it was reliable. Her friend also claimed to have made a handsome profit. ''I was attracted by the profit - several times the interest from bank savings - and the promise that I would not lose more than two per cent of my capital. ''I do not blame my friend. I understand there are risks in speculation and I invested of my own freewill.'' However, Miss Chan was angered because she had signed a document closing her account at the beginning of the month. She was told she owed $15,000 to the company. The victims are planning to form a support group to see what they can do about getting any money back.