Do not buy digital gold from phone pay

i have recently purchased 1gm of digital gold from phone pay, so they charged market price +3% GST. price was 14839.32 +445.2 = 15285/- so now I am planning to sell the market price is 15464.57/- 14999.51/- and if want buy now 15464.57+ 3% GST. while selling also they are deducting GST of 3% and also take 3% GST from buyer along with market price.