No service from Sizwe - AGAIN!!!!

I went for a sleep study and it was determined I suffer from sleep apnea. I tried phoning for pre Auth to go for a 2nd sleep study and the consultant I spoke to demanded a tariff code. There is no tariff code on the documents and I didn't have a tariff code when I phoned for authorisation for the first sleep study. When I asked the lady about that, she gave me a 5 digit code. The code for the second sleep study is also a 4 digit code, but according to the lady not accepted. Tried phoning back - no answer on the pre Auth number. Why is everything a struggle since Sizwe took over the administration of Hosmed??? When you hold on for pre Auth it's mentioned that the ICD10 and procedure code must be provided.... Nothing about a tariff code. The Sizwe personnel just want to get rid of the customer - they don't want to go through some trouble to assist the customer!!!!