Receive a $500 JB Hi-Fi voucher plus $10 monthly credit for the first twelve months bringing the $69 plan to $59 a month.
While the promo says $400, the person on the phone line said the voucher amount is currently $500
Comes with a bonus 20gb bringing it to 80gb per month.
Works out to about $17.3 a month after the voucher.
Offer available by calling 13 52 44.
I'd go in and show them the pic in OPs post:
https://files.ozbargain.com.au/upload/260676/83144/screen_sh…
Otherwise, others have said try asking nicely on the Telstra online chat ?