Punjab National Bank [PNB] — my refund of 2499 & 2499

Hi sir / mam,
Sir maine flipkart ki taraf se 2 shoes purchase kiya tha jo ki maine return kar diya tha. Flipkart ne uska refund amount (₹2499 & ₹2499) 21.10.2019 ko credit kar diya jo 28.10.2019 tak mere account main credit hona tha but kuch network ki problem ke karan account main abhi tak credit nahi ho paya hai. Maine flipkart walo se baat ki to unhone chargeback dispute form fill karne ko kaha maine bank ke customer care and pnb branch me contact kiya to unhone mana kar diya. Flipkart walo ne mujhe refence no. Bhi diya hai. Please help me asap.