Brand New IPhone 8 - recent upgrade

I more than disappointed with my recent upgrade with Vodacom Hartbee****rt of an iphone 8 plus which has software issues. Now I am told that the standard procedures apply, where I have to.leave.my phone for repairs and will only get it back in 3 weeks. Honestly this is a phone.worth.more than.R17 000.00 and I get such treatment, Vodacom should just take their phone back and.let me get another phone as I cannot go without a phone for.that long especially on holiday. This is bad service from Vodacom