Why do I get heartburn so bad my ears burn after eating?

One of the reasons is that you probably developed a hiatal hernia, is the most common cause after gastric sleeve. You need to seek medical attention to get studies to diagnose you problem and probably get a revision surgery to fix the hiatal hernia. Seek a consultation with a bariatric surgeon.
GR

Hello
Thank you so much for your question and congratulation on taking the decision to become healthier.
The best recommendation is to contact the doctor who perform the procedure, it's for your best if the doctor check on you to prescribe medication.
In addition to other criteria such as medical indications and safety, behavioral health assessments, and so forth I recommend that you go to your certified doctor so he can guide you and do the check up necessary to assist you.
My  Best Wishes,

You need to see a bariatric surgeon to be evaluated; most likely with an upper GI X-ray and endoscopy.  There are several causes.  It may be possible to "fix" the sleeve; if not, the most successful way to cure the reflux is to have a conversion to Roux-en-Y gastric bypass.