***** on Discovery Card - very very poor response

I reported ***** on my credit card to days ago - the ***** Department promised to investigate and inform me accordingly. (10 min call duration on my cell phone) Today I phoned them again as I did not even received a case reference number after the first call. (14 min duration on my cell phone) At least I received a case number and a promise of a turnaround time of 72 hours. Somebody linked my card to Apple Pay and then did 4 transactions of betting and gambling at Playabets using Apple Pay. I do not even have any Apple device to use this facility. My impression is that Discovery Bank is not serious to help or investigate ***** on a 71 yr old pensioner's card. (I will try hard to get the gentleman's name who promised a ref number and an investigation during my first call.)