Oh dear! You can't actually delete it, but you can create the email again with the links corrected and send again and head the subject 'oops' and then explain in the opening para that you made a mistake.
We're all human and people are forgiving if you own up to mistakes.
Hi @DebbieG90 ,
If the email was already fully sent out to your contacts, there wouldn't be a way to retract it. If it was still Scheduled you could unschedule it, but alas. Generally contacts don't care too much about receiving the (very) occasional correction emails, so I'd recommend what @BizTechWiz suggested and copy the email campaign in question. Then just make your edits, double- and triple-check the links, imagery, and list(s) you're selecting, then send out the edit with a slightly altered subject line. It could say something like Oops! Correction: or Corrected: or Updated Info: before going into the rest of the original subject line.