There is a lot of really great aspects to the page! I am just going to be nit picking, because honestly, it’s not that bad at all!
FB Ads, in my experience always produce a really high bounce rate, so the best thing I have found is to have a super enticing hero, with minimal text. I find the text in your hero slightly difficult to read, I would suggest an overlay on the whole image just to make the text easier to read.
There is also a great deal of text on the page. It’s fine, just over whelming. I would suggest some collapsible sections and then if a user wants to read more they can expand it.
The logos of the forms of payment are pixelated on my end, which is a bit of a red flag.
When clicking on “contribute to a better africa” CTA and it redirects, I notice the colour red isn’t consistent, which is slightly confusing. Is it the main website? Is it an affiliate? As a user I think consistency is best.
As the main website is a non-profit I would highlight that as well on the LP.
The “time left” section, isn’t overly enticing. I would probably remove that. What I mean by that, is that (as of right now) there is 19 days left - which is great, but there is no sense of urgency. It is almost giving me the ‘meh, I might as well come back in a month’ instead of ‘I need to do this now’.