APPLE IPHONES ARE TOO SMART FOR THE APPLE TECHNICIANS

I HAD MY SOUTH AFRICAN IPHONE ****** IN THE UK IN JUNE 2025. I TRIED THE REGENT STREET ISTORE AND THE SANDTON CITY ISTORE 5 TIMES TO RESTORE MY NEW REPLACED IPHONE. IMPOSSIBLE TO ACHIEVE. I THINK THE STAFF AND PERSONNEL ARE INADEQUATELY TRAINED AND ARE NOT ABLE TO RESTORE MY PHONE. IT IS NOW AUGUST AND I STILL DO NOT HAVE WHATSAPP RESTORED ADEQUATELY. NOR DOES MY CALENDAR SYNC WITH MY LAPTOP. CAN ANYONE AT APPLE ASSIST!?