Mistakenly transferred money into wrong account

I am Siphokazi Dlamini and i’m so desperate to get help from capitec,I have mistakenly transferred money into wrong account from capitec app..I have this beneficiary on my capitec app as Siphokazi and i have paid her back in 2017 Dec so really i cant recall her or know her so i have transferred the amount more than 20 000 into her account by mistake thinking I'm transferring to my FNB acc and she is also using FNB.I have been up and down to Capitec bank and FNB but i don't see any progress yet.I have reported this matter from Wednesday the 11th but still no progress I am worried and fastruated and disappointed by this two banks I'm currently using.FNB has told me theres nothing they can do its Capitec who needs to sort it out,and Capitec is telling me to wait 14 days by then maybe this person would have finished all the money i have mistakenly transferred...Im stressed and worried Im disappointed i am very disappointed