Promotion not honored

I joined Xfinity months ago for their internet, the promotion was I would receive a $200 gift card after 90 days of service and by remaining in good standard. 

When I called on Monday I was told to go into an Xfinity store to redeem the gift card. I did and the rep said they don’t disburse them that I’d have to go to a corporate store. I left and called customer service a ticket was poked with a promise that someone would call. 

I have yet to hear back and I called customer service again, today I was told I didn’t redeem the coupon under membership benefits but not to worry I had more coupons to choose from. 

I advised the rep that I never received said coupon and I was placed on hold and the call wa disconnected. 

it’s apparent that the sales rep lied to business. I’m currently shopping for a new carrier