Is it true that HG Wells did not believe God exists?

To a large extent, yes. H. G. Wells was brought up a strict Christian, but gradually began to reject the Christian God in favour of a 'personal' God. He would later repudiate God entirely , declaring himself "an honest atheist". Yet his biographer concluded that Wells' youthful religious beliefs still influenced him, even if unconsciously, saying that he "always sought to reconcile the scientific concepts he had acquired at South Kensington with the doctrines of evangelical [Christian] belief."