Jaxtakart — Unauthorized amount deduction

Sir/mam maine jaxtakart se 25/07/2020 ko ek mobile phone ki battery purchase ki thi amount 899 rs ki aur abhi tak dispatch nahi hua hai mai jab jaxtakart me call kiya to bol rahe the ki 1 week me dispatch ho jayega aur tb se sirf 1 week ka time hi dete a rahe hai hum bole ki mera order cancel kareke mera amount refund kar do to keh rahe hai ki amount refund nahi hoga mera order no 563574 hai jis a/c no. se amount deduct hua tha 7018 please help me sir