Nostalrius Begins - Quality wow vanilla realm (1.12)

Hi,

I'm unable to complete the quest "The Green Hills of Stranglethorn". You can see here that I got all 4 chapters in my bag.

Abandoning the quest and retaking is not an option as the 4 chapters will be deleted and I cannot obtain the chapters again as the 4 page quests are not repeatable.

Any help will be greatly appreciated.

You can abandon and retake I believe.

If I try to abandon it specifically says that all the chapters will be deleted and ask me to confirm. I already said that it's not an option to redo all the pages quests. So of course I can abandon and retake, but then I'll have zero chance of ever competing it as I'll not have the chapters.