I have too faced the same problem, they were ignoring my call as well. What i did was directly visited them with the returned cloths at 12pm when there are new customers in there shop and told them to exchange it, they could not deny as there are customers in there shop and i got the new cloths obiviously at a high rate as there business is to cheat people, I didn't have any options because i already paid them the money 1 week back and they don't bargain but what gave a sigh of relief to me was that i finnaly got new cloths of my choice and took hand delivery.
Also the cloths which i selected on my previous visit now they told me that there is no stock in the factory. In real sense they don't have a factory, they just lie to the people to create good impression.
What these people do is that they buy cloths from other wholesaler at market price-Example- Rs 800 and then show us that materilal at lower price on our first vist like Rs 585, Rs525 or even 405 any odd figures and when they send the delivery by transport they send us low quality dress at high price.
I stay in Bombay so i visited there as it was jus 4-5 hours journey for me but there are people who come from far away places like kerala, chennai, hyderabad, UP, MP etc they find hard to get it replaced.
Every Day there are may new customers because people once come here and never visit the shop again. People who newly visit surat they contact local agent and these agents get a vey high commission ie 10 % from SAI LEELA compared to normal 1% OR 2% from other shop.
I got to know about these shop through an auto rickshaw driver who refered me here . Later i came to know that SAI LEELA also have there setting done with the auto-rickshaw driver and give them 10%-15% percentage of commision depending on there sales.
It was really horibble expirence.