EP T-21 right earbud not charging

Bought aukey ep t-21 few days ago. Till now it seemed to be working fine but suddenly since last two days right earbud has stopped charging. Whenever I put the buds back in the case left earbud starts blinking but right won’t buzz. They were even not disconnecting from my phone. Then when I tried taking them out and connecting seperately, left earbud shows battery as 90% charged whereas right one shows 70% charged.

Even while in case right earbud automatically connects to my cellphone