Bill vs Offer

After an hour on the phone asking about options to compete with new local fiber, a rep offered promotions that would bring my rate down to a competitive level. He explained that first we'd go through the updated service so I clicked through those. The rate went high, double what I was paying a couple months ago and more than twice what the fiber costs. He explained the promotions would be applied in the next 7-10 days and show on my bill. I asked for a reference number for our discussion and he said the notes would be on my account. Now the bill auto- paid and no promotions were applied. It stayed the double price. How do I get this corrected?!