R75 Uber Eats promo is a ****

I downloaded the Uber Eats app recently, then they sent me an email saying I can get R 75 off for an order over R 200, before Sunday 11 April. When I tried to apply btge R75 off promo at checkout, the app said the promo had expired. I then had to pay the full amount, although it was still before the so-called expiry date. Uber Eats is a ****. Stay away.