Vodacom doesn’t care about Business clients!!

We have a business account with Vodacom for over 15 years. Monthly business account over R5000. We recently upgraded 2 x business lines to iPhone XR 256gb. For the last Month and a half the phones drop calls or is simply unavailable. After numerous calls to the front office, vbsadmin back office and every other office they finally told us to run the phones off 4G. (Hello!! What’s the purpose of owing an iPhone then). I must run the phone off “E” and have bad quality calls and bad slow internet but pay for 4G and the rest. they said it is IPhone issue so Vodacom cannot exchange these phones ! And I’m stuck in a contract that We have to pay for but cannot get it make calls. The business loses thousands of rands in sales. Vodacom doesn’t care about business clients !! I am fed up. Someone will probably call me and I will have to explain the whole issue for the millionth time. Guess what, they can’t get hold of me because my expensive phone doesn’t accept calls, and the *********** Vodacom employee will then mark the ticket as complete!! Call me on my land line then. Give me a refund on my contract or change these phones. And don’t tell me to send it for repairs, without supplying me a phone of equal value.