I used my MAvic Pro Plat. less than 30 times, out of the three batteries,  two are swollen .
is there anything I can do with those batteries ? and why did they puff up ?

Unless you explain your usage, where do we start? Describe when/how you recharge after use. What type of flying is your norm? Long range, sports mode and fast manoeuvres mainly or seldom, just used for photography. Battery % level before you land... Climate you fly in? Do you know how to extend battery life?

Numerous reasons but once they are bloated they are no longer fit for purpose

myr drone only fly 22min in the best days t.t