dodgy calls

For context, I'm non-Chinese international student, but I received lots of calls, most of which when I call back, they just turn off. But the few of which, they either straight out speak Chinese to me, meaning I have 0 idea what they say, and when I try to speak English to them they just cut off. There's this one rare them recently, the default voice is in English, and it says 'you have ordered lots of parcels from XXX service but they all returned back because you didnt confirm. For further explanation in English, press 1". I pressed 1, bc its the rare time its English and I got a feeling its all related. And to my surprise, they still straight out speak Chinese to me. I said, 'wait I'm very sure I chose English.' And the girl on the other side is like 'okay.... so whats your issue'. So I asked 'what kind of deliver is linked to my phone number, im pretty sure i ordered nothing, What service is this?' Then she stayed silence a bit and said 'Okay Ling sth are you okay?'. I was like 'Im sorry?' and then she just turn off. Like, what is this service and who is even Ling...?? Should I worry about this. Like is this common for students in Australia, like is there smth I can do about this. I know I can just ignore the calls, but Im just worried my phone number is registered to some dodgy stuff. I post here because I really dont give out my numbers much other than for school stuff, except for the stalls for freebies in o weeks. So just wondering if its related to that. But it does, I think I wont be the only one experiencing the same thing. So I kind of dont thing so...? Im just incredibly confused right now :( Thanks for listening and any advice will be highly appreciated :(