Reward issue

I reached out to a rep after waiting 6 months for rewards that I never received. I called after two online chats that pro.used the rewards were on the way. The rep on the phone told me that I would not receive anything even though I have the chat transcripts (this is why I prefer online chats). I just sent an email to the company but would like to resolve this. I am okay with canceling my service if AT&T won't honor their contract. Here is the transcript of the most recent chat session:

Reference Number: 741502875249030976
DATE/TIME: 2017-04-13 09:45:33
Your chat transcript:
PLEASE DO NOT REPLY TO THIS MESSAGE - All replies are automatically deleted.
AT&T : Hello! Thanks for choosing AT&T Chat.
Douglas K : Hello, my name is Douglas K. I'll be happy to assist you.
Douglas K : Good afternoon!
Douglas K : How can I help you?
Kirk : When we signed up for service we were offered a $250 gift card. We have only received $50 to date. Can you check on this?
Douglas K : I see that you have an issue with the reward cards is that correct?
Douglas K : I see that the other reward card have been mailed to you one by one . You will receive all the promised reward cards please not to worry.
Douglas K : I can help you with that!
Douglas K : I have checked all the details so please not to worry you will receive all the reward cards as promised to you.
Kirk : What is the timeline for receiving the cards?
Douglas K : It will be within the next 2 weeks that you will be receiving all the reward cards.
Kirk : Thank you.
Douglas K : Is there anything else I can help you with? I'd be glad to assist.
Kirk : Can you send me a transcript of this? And yes, I do need assistance with another issue
Douglas K : We do not have the ability to send email, however you are given the option to print or email this transcript. A printer or email icon is located in the lower left hand corner of your chat window.
Douglas K : May I please know the other issue so that I can help you with that?