If we couldn't use our banks to buy Bitcoin then I think using other online wallets to pay for it.
P2P would also be a good way to purchase crypto or you could also use Bitcoin ATM machine if there is one at your location.
This! if you can't use your bank to buy bitcoin, you can transfer it to other wallets like credit card, or debit (but I'm using Gcash since I live in Philippines) and go peer to peer or meet them in person or in online.