3D Security on online shopping

On the 24th of August 2019, I performed an online transaction using my ABSA credit card, to my surprise the transaction went through without verification on my phone. On the 26th of August, I visited their branch, requested assistance on why the transaction went through without verification. The individual assisting me, called ABSA 3D call centre explaining the issue, as a result, the call centre agent explained that it is a VISA problem, as it now and again allows the transactions to go through without sending verification/authentication. Now I understand why ABSA has a high rate of online transactions according to BusinessTech of 11 March 2019. I regret moving to ABSA as my previous bank was a bit pricey, BUT I never experienced such irresponsible experience and they do not want to take responsibility. The call centre agent told me in no more than many words, "It is what is, live with it" I am extremely worried that my banking details are all over now.