IS MIWAY REWARDS A **** OF SOME SORT??

On 5 Feb I took up a new insurance with MIWAY about an hour later I got an email from MiWay Brand Champion is Rewarding to redeem a voucher which immediately I did - I then get an email saying "It appears you have already been sent your voucher. For further queries - please contact the Call Center on ********** 517" I call in and was advised to wait 48 hours. 8 Feb 2018 at 11:00 am I call again because I didn't get the voucher, I spoke to a lady who speaks to the "supervisor" and tells me there is a system error I should wait for 7 working days. I ask for the supervisor name and surname so I know who I dealt with should I need to come back, the call center agent refuses to give me the surname, she keeps me on hold to speak to YASMEEN and still comes back to say the same this. I ask for her name, PEARL she refuses to give me her surname too. IS MIWAY REWARDS A **** OF SOME SORT if you giving people the right information it should not be a problem to give out your information as the representative of the company.