Pantaloons - Credit note

* weeks ago, I bought a shirt from pantaloons (Kankurgachi) and when I went to the counter to pay for it, the cashier asked for my number. I gave my mobile number, he typed that one first. But then I asked if I can use pantaloons card from * years ago for any discounts. he asked for the phone number linked to the card and typed it down but then said that the card is no more valid. And I said that's fine. But I had no idea that he used the mobile number linked to that card to make the bill. It an old number which is out of service. Next day due to some defects, I returned the shirt and the cashier sent me a credit note to the old phone number. When I said I didn't receive any credit note, then I realized it was sent to the old number. I went to customer care but they said once its gone then nothing can be done. They are not helping me in an way. I told them you can call that number and see for yourself that its out of service. They refused to help me in any way. Im buying from pantaloons for so many years, I bought more than * lakhs worth of items. But just for **** rupees, they are not trying to help me in any way. This is the last time, I am going to pantaloons. Worst service ever!! very bad