How can I prove that I did a review for a journal? About two years ago, I did a review for a journal (Engineering Failure Analysis, which is published by Elsevier). At that time my affiliation was different from today and I used my institutional email at that time to register as a reviewer in the Elsevier website. But right now that email is deleted and I don't have access to that email. I need to show somewhere that I did a review for this journal and they need some evidence. Despite, I have access to my account in Elsevier (The email is deleted but the account in Elsevier website remained unchanged and I have access to it), I can't find their acknowledgment email for my review. I asked their editorial office and their editor-in-chief 3 times and still after about 1 month I didn't get any answer yet. So, basically I want to know is it enough to take screen capture and show that I did the review to proof or not? Cause in some websites like Publons, it needs to send the confirmation email to their email server to be able to put it in your webpage and count it as a review, but I don't have that confirmation email and I don't think I could get that due to they're ignoring my emails. Any idea, suggestion, and recommendation is appreciated.

Also if somebody knows some sort of customer service or front desk information for Elsevier, I will appreciate if he/she could give it to me cause maybe it could be helpful to contact them directly. I searched a lot in their website but I didn't find anything about how to contact them.
Ask the editorial office. You write that you've already asked them, but send them a reminder. Tell explicitly what you're looking for. In my experience for example, a letter saying you performed a review, on official Elsevier letterhead paper &amp; with the desk editor's signature, suffices. This really should be something the journal office can do quickly. If they haven't responded my guess is that they're waiting for the editor-in-chief to respond, which is unnecessary.