An Xfinity rep tried to get my bank account info

We had a lightning strike this evening that fried our modem. After much frustration with the automated assistant we finally reached a live person (who told me he was in India). I told him we just need a new modem. He said he would ship one but he needed my 'approval' before he could ship it. I told him of course i approved, that's the whole reason i was calling. He said no, he needed to send me a text with a link where i needed to go make the approval. I received the text and followed the link, which took me to a page asking me to set up my Xfinity payments and asked for my name, my checking account number and my routing number. Nowhere did it mention anything about approving the shipment. I told him this and he said I just needed to 'check all the boxes' and then click at the bottom of the page. I told him there was no way I would do that, so he said he'd text the link again. I followed the link and it went to the same page, asking for my bank account info. I told him this still wasn't right and asked what in the world is going on here. He said he'd set it up so I could just give a verbal approval (with no explanation of the suspicious links). I got fed up and hung up on him. When I went to take a screenshot of the suspicious page(s), they had already mysteriously 'expired' and were no longer available. What in the heck is going on.  I'm so angry I can hardly see straight. We've been Comcast customers for 20+ years and I deserve to be treated better than this.