Paypal is reversible and it's a bad way to buy bitcoin unless the person who has the PayPal is trusted. OP, you are not and this is going tobe an assumed scam attempt.
What do you suggest me to do about this? It is not a scam attempt.
I mean, someone
might trust you enough to do this, but what you're doing is what happens 10 times a day here. A newbie wants to buy btc with PayPal and does a chargeback. I suggest you buy something with what you have or go to wesellcrypto.com.