Frequent calls at the same hour suggest a scripted outreach, often tied to sales or lead generation. The pattern of waking you during a nap points to a nuisance schedule that ignores typical quiet hours, which is common for aggressive telemarketing operations. Consider registering the number on the national Do Not Call Registry and using call‑blocking features on your phone. If the calls persist, report them to the FCC and your carrier; they can flag the source and potentially block future attempts. Keeping a log of call times and any recorded messages can also help when filing complaints.
It's unlikely that genuine telemarketers operate from call centers, as there's no need for such services anymore, making the claim questionable.
Daily calls at 3:30 pm from this number are disrupting my rest, as I recover from chronic heart failure.