The main problem with paying for Facebook services is that there are no non-cash payments for Russia, neither in rubles nor in dollars; Internet banking is available for other countries (for example, the USA, payment in $).
Payment for Facebook services is only available by credit card.
Many companies get out of the situation in the following way: they open a separate card for one of their employees at the bank and pay for WhatsApp from this card, and then reimburse these expenses according to advance reports.
Advertising on Facebook and Instagram is paid for in the same way; this has become especially relevant given the latest changes in Facebook pricing: incoming messages from Facebook and Instagram advertising are not charged by WhatsApp and this should be used.