Now my MacBook didn't boot up until I plugged in the charger. Even tho it was 90 percent charged. Now why did it do that 😢

Sounds like your battery is messed up. Possibly a screwed up contact with the mobo that is bypassed when you have it plugged in. Had the opposite issue with and Asus. If it wasn't a mac I would suggest getting another battery.

If you are in the UK...
Under consumer laws in the UK, consumers are entitled to a free of charge repair or replacement, discount or refund by the seller, of defective goods or goods which do not conform with the contract of sale. For goods purchased in England or Wales, these rights expire six years from delivery of the goods and for goods purchased in Scotland, these rights expire five years from delivery of the goods.