Voucher not given even tho was part of contract deal

Did an upgrade over the black friday weekend. Bought a summer deal phone. Was told when trying to redeem the voucher that it would be placed in the box with the phone. Phone arrives no voucher. Customer care tells me there was no voucher showing on the invoice. I never even received an invoice. Then told they will get the online department to look back at the what deals were loaded that weekend. Hear nothing back from them. Told to show proof of the voucher deal two weeks later. Then month goes by no response on my emails. Received an email saying ticket closed. Reopened issue with no resolve. Then the customer care person closes the ticket without responding to my last email same as they did at start of the month.

Real top notch customer care.