hi i am looking for alternative proxy

I bought a residential proxy package of about 200 piaproxy proxies, everything works very well from the relatively stable speed but I don't understand why I can only use it for a very short time, about 15 minutes or 30 minutes, although in their Piaproxy software it is still green, indicating that the proxy can still be used normally, which makes me quite uncomfortable. I am looking for a type of residential proxy with a wide IP range across the US or many countries. If anyone knows a quality place, please introduce me.

maybe it was designed to do so

Rotating residential proxies will be what you're looking for but usually IP's rotate every 15-30 minutes. But you can target zip codes or ASN's to make things look more consistent

try soax.io or bightdata

Do you need the proxies to remain static or they can rotate? Anyhow, you can find most of the sellers in BHW marketplace and then choose from that - https://www.blackhatworld.com/forums/proxies-for-sale.112/