Error proxies, necesito ayuda

Error proxies, help me*

Hi all, the problem I have is that when using HTTP / S proxies with anonymity, I have errors in almost all:

1º
Connection Interrupted
The document contains no data.
The network link was interrupted while negotiating a connection. Please try again.

2º
Proxy Server Refused Connection
The connection was refused when attempting to contact the proxy server you have configured. Please check your proxy settings and try again.

3º
Data Transfer Interrupted

The connection to ww. .....com has terminated unexpectedly. Some data may have been transferred.

4º
Secure Connection Failed

ww .......com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is not trusted. (Error code: sec_error_untrusted_issuer)

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The proxies are free, the strange thing is that I check them on websites like hidemyname and tell me they are working

Where I can get proxies that do not give these errors, I am willing to pay something for some large lists of http / s proxies that have anonymity (low, medium, high ...)
Proxies can be used one day and the next day use another, no problem.

Thank you very much for reading me, I hope you can help me.

Yoo buy them in the market place or you scrape for them .

Apps used

Gsa proxie app from the germans very good...(( gsa indexing same company))
Updated regular

Scrapebox addon gor scrapping proxies
)( updated regular

Nohands proxies (( updated regular ))
(( famous for no hand seo))

There others but not used or had the pleasure yet

You can use the misc to track these apps down ...

There all one time payment and work well.

You can also use this forum to get
Proxies that are private or shared but there on subscription monthly...

Thanks for answering, if I already tried the gsa ... but I could not get new proxies, I'll keep looking