I Have Blocked Someone

Actually on WhatsApp, not here..
A random number sent me a "Hi".. I replied: "Hi. Do I know you?".. "No"; he replied!! "I don't know you either" he continued!!! we exchanged couple messages and he mentioned his name and asked about mine, I told him I am not interested and will not tell my name to random people... he insisted that he just want to be friend with me and asked about my name several times and I kept replying that I am interested in his friendship.. then I deleted the conversation, but did not block him then because I thought he understood!!
Few weeks later, he sent another "Hi"... I doubted that he is the same guy, so I asked: "do you know me?". "No" he replied and repeated the same story that he just wants to be friend with me and insisted to know my name and why I am not interested...bla bla bla... I made it clear and told him several times that I do not friend with random strangers and do not give my number to random people and he kept asking: why you don't want to friend with me? any specific reason? why do you not try me?!!! etc. It was so much annoying!!
So finally I had no choice but to block him, otherwise, he would have kept bothering me with his stupid questions all the time