I did an annual Apple Music subscription but i got two years of subscription and it got deducted 2 years amount.

I have recently added 2000 INR in apple fund, and then I renewed my annual subscription for Apple Music which cost 999/year. Now when i saw the end date of subscription it’s in 2026 and 1998 has been deducted.. idk how it happened, I specifically did an annual subscription… i need 999 INR refund because i don’t need two year subscription at the moment… could somebody please help me out.