Flipkart — Regarding returning my orders

I have ordered choppper hand blender combo and pakkad chimta combo both are defective I have issued replacement and again it is given defective. Now i want to return both products and demand refund and both products are eligible for return but the mobile number registered on my flipkart id has expired and is now alloted to someone else. So to chat support i have mentioned this several times but there is no heed kindly resolve my issue. my registered number (not working) is [protected] and email is [protected]@gmail.com