Fix/patch the hole in the wordpress because of which the hosting lies

Hosting: fastvps.ru (we have a virtual administered server, but the administrator, as you can guess – there is no :)

Support response on what happened:

Your server is overloaded due to an attack on the site (%our_site) - it receives many requests through external vulnerable services:

[Next is a bunch of sample requests, sort of: 160.245.126.48 - - [19/Jun/2022:10:41:04 0300] "GET/HTTP/1.0" 200 9730 "%URL%" "Opera/9.80 (X11 Linux i686 U en) Presto/2.2.15 Version/10.10"]


You need to connect any external anti-theft service for the site
DDoS, e.g. DDoS Protect, DDoS Guard, CloudFlare, etc. to attack
filtered at their level.



Please let us know if you require further information or assistance.

I am looking for a person who will help eliminate the problem. I dont know how much it can/should cost. This is not the first time this has happened, last time a person fixed a problem in a couple of hours. If Im sorely mistaken with my timing/budget estimate, throw rotten tomatoes (let me know). But I hope Im not wrong :)

p.s. Hoster abandoned the ISP-manager. As a replacement, they seemed to offer some kind of management system of their own, but I did not understand. The previous specialist worked via SSH.