See Nyala font link, it shows “unknown” in license column. I think this make problem with your approval.
It is better to previously check fonts license, if you have used non-standard font in item then you have to describe about it in your item description and also provide standard font link to buyer. because non-standard font may make problem in future with buyer regarding its license. Every use of non-standard font in item, need appropriate detail mention on item description.
I think QR code image is too big to fit within print area. GR want creativity and unique in their library. Almost card is looking good. At my my glance need to change QR code size and front style as often other viewer used it(i think). There is one benefit is sure if business card or any graphic item rejected by GR that you will be try to create more creative and good design so it may possible your creativity and design skill will be automatically improved.
keep smiling and trying again again, no any change vacant without effort.
@demorfoza i like your opinion regarding designs, i think you have great experience of design. I want your opinion and guidance about my design, so here submit my some of rejected business card among others. hope u will guide me to make better.thanks