Updating the title of a Series episode

There was this Spanish TV show called Novela in the 1960s/1970s and I just recently discovered some more episodes and I added them. There is this mini-series in the show called "Shirley" that has 5 episodes (scroll down here and you'll see it https://www.imdb.com/title/tt0447779/episodes?year=1972) The problem is that only one of them, "Shirley" (https://www.imdb.com/title/tt0663020/?ref_=ttep_ep17) was already here, but not the others, and this is actually the second episodes not the first. Sho it should be "Shirley II". I didn't realize about this when I added the first episode, now named "Shirley II" https://www.imdb.com/title/tt28315761/?ref_=ttep_ep16 so I want to name "Shirley II" as "Shirley I", and "Shirley" as "Shirley II". I have already submitted the info regarding the wrong II to be changed onto I but so far nothing happened. And I cannot rename "Shirley" as "Shirley II" until the change of the previous one is done because then it asks to merge both, but they are not the same as they are episode 1 and 2 with their ared dates and all. Please, can anyone do this for me? Thanks.