Not paying out my investment

I recently moved over to Old Mutual and cancelled all my Momentum contracts.

I had a investment with Momentum which and I ordered to pay out. My first cancellation letter was received on 29 August 2017. Since then Momentum sent emails confirming that the payment will be made within 24 to 48 hours. Today is 15 September 2017 (3 weeks later), and still no payment reflects in my bank account.

I complained yesterday (14 September 2017) again, and they confirmed that the payment will reflect first thing this morning (15 September 2017).

This is really a joke.