Just email them and ask them to move your cash back to an EFA. But... While the amount is doubled when put into the EFA, you can only withdraw it out every 3 years and when you withdraw, the withdrawn amount is halved. Sounds weird but basically the EFA can only be used on tyres and your excess. If you ever take the cash portion out then you halve that money (back to the amount you would have received).
They key is actually, once your EFA is at a high amount, is to tell them increase your excess to something crazy like R10k. Which lowers your monthly premium. And now if you have an accident, it just comes out your EFA. So I changed my excess to R10k and it lowered my premium by R150pm (R1800 per year).
I have about R32000 in my EFA after 2 years.