Lied to by multiple chat agents, and possibly hacked

I am beyond frustrated and very concerned about Xfinity's chat agents. When I set up my wifi plan, I talked to an agent over the phone and she was great. She set me up on a student plan which meant it was discounted and I would be receiving a gift card for signing up and would get it in a couple days at the most. Fast forward more than a couple days I never received the gift card. I figured I would reach out to the live chat and it would be a simple solution. It was not. The first chat agent I talked to seemed to not fully understand what the problem was but then all the sudden said I would receive the gift card in 24-48 hours. I never got anything. So I reached out to the chat again and after talking to an agent for a while they transferred me to a different team/agent. That agent said I would receive the gift card in 24 hours (mind you the first agent said I would get a text that I needed to confirm and then would get an email with the code, the second agent just said I would get an email). And, the agent said they created a ticket and gave me the ticket ID. There was no ticket on my account. And I could not find any proof of the ticket and am pretty sure they just gave me a fake ID. So after it had been more than 24 hours I contacted the chat again. This time I was connected with an agent who kept telling me to "keep the chat active" while they were working on it for like 20 minutes. They finally said I would receive the gift card in 10 days. I asked why I was getting such different information from everyone and they said there is a "glitch" in my account. I asked how I am supposed to know the status of this request and they said they created a ticket. After me poking around more trying to make sure something was actually being done (and the agent seemingly getting annoyed with me asking basic questions) the agent sent me a ticket ID (surprise, it was another fake ID and there is no ticket on my account). The agent then proceeded to say they were adding a "promotion" to my account for the troubles and also tried to sell me a mobile line. I said no to the mobile line and also never received any "promotion". At the end of the chat I was pretty fed up and the agent asked me to rate them 1-10 (which I found odd because the robot after the chat ends asks that, so why were they asking me now?) I just ended the chat without a rating, because frankly it wouldn't have been a good one. About 30 seconds after I ended the live chat, I began to get spammed with xfinity codes to my mobile phone back to back. I was not requesting any codes. The codes stopped for a minute, and then my wifi went completely out. I was able to go change my password, although it took a while because I have almost no cell service in my home. A minute or two after I changed my password the wifi came back on. I am extremely concerned about the integrity of these chat agents, and the fact that so many people on this forum are having similar experiences. And after all of those chats I haven't actually received any help, just fake ticket codes and blatant lies. I would call/go into a store but I am currently sick and have lost my voice, hence why I was trying to solve this over chat. And it is not about the gift card anymore (it hasn't been for a while!), I am just wildly concerned about this service and that my account may have been hacked, and I cannot get any help because the "help" are the scammers!