Repeatedly no service or feedback

Good day. I recently made an eft from my caputec account. I immediately received 2 messages stating that the exact same ammount went through twice, i logged back in and checked my statement to see that an exact double payment went through twice. I phoned capitec customer customer care to ask what happened, i also asked a reversal. I stated that i whant to speak to a manager. My main concern is security, i do sometimes do big transactions. I repeatedly contacted capitec with no feedback, they assured me that the problem will be sent to the technical department, and as per ky request that a manager will follow up. This is now 4 weeks and no feedback from capitec. I can make repeat calls to them and only receive ill promises. Ithe only security i now have is to remove all funds from capitec and transfer it to my other accounts.