Alitalia- flight cancellation refund! NO response

I booked an Alitalia Flight from Genoa to Johannesburg for Monday 9th September. Flying out at 19:00 and arriving Johannesburg 9:00 on Tuesday 10th. While checking in for my first flight at 17:00 I received a mail that my flight from Rome to JHB had been cancelled and I would be rescheduled on a flight the following morning. At the customer service desk I was instructed to request a refund for my ticket. Once arriving in Rome I asked at customer service and was told I could only do this online. The following morning I was put on a 9:00 flight to JHB which was then again delayed for another 1.5hrs. I arrived in JHB at 20:00 on the 10th so an entire day of work lost. I also received an email instructing me to request a refund for my cancelled flight. The following day I called the Alitalia call center for South Africa, they informed me that I had to email *** which I did, twice and I have had ZERO response after 5 days. This is the third flight cancellation that I have experienced with Alitalia and I would like a response from someone immediately.