Canara Bank — regarding refund of amazon india

Sir i cancelled my order from amazon india on 29 may 2020 amounting to rs. 7000/- for which refund has been issued on 29 may 2020 but till now i have not received any amount and when i contacted amazon customer care they issued me one refund reference number that is 344237 and told me to contact bank customer care and when i contacted bank customer care they are telling me we can't do anything about that. So kindly do the needful