Did our app get banned because of too many connections?

We recently have been trying to access our app payments.paypack.rw but it seems like we’ve been banned. on the frontend we are receiving a 502 Bad Gateway error and here is a Curl output:

* Rebuilt URL to: https://payments.paypack.rw/
*   Trying 213.188.209.3...
* TCP_NODELAY set
* Connected to payments.paypack.rw (213.188.209.3) port 443 (#0)
* schannel: SSL/TLS connection with payments.paypack.rw port 443 (step 1/3)
* schannel: checking server certificate revocation
* schannel: sending initial handshake data: sending 184 bytes...
* schannel: sent initial handshake data: sent 184 bytes
* schannel: SSL/TLS connection with payments.paypack.rw port 443 (step 2/3)
* schannel: failed to receive handshake, need more data
* schannel: SSL/TLS connection with payments.paypack.rw port 443 (step 2/3)
* schannel: encrypted data got 4038
* schannel: encrypted data buffer: offset 4038 length 4096
* schannel: sending next handshake data: sending 93 bytes...
* schannel: SSL/TLS connection with payments.paypack.rw port 443 (step 2/3)
* schannel: encrypted data got 51
* schannel: encrypted data buffer: offset 51 length 4096
* schannel: SSL/TLS handshake complete
* schannel: SSL/TLS connection with payments.paypack.rw port 443 (step 3/3)
* schannel: stored credential handle in session cache
> GET / HTTP/1.1
> Host: payments.paypack.rw
> User-Agent: curl/7.55.1
> Accept: */*
>
* schannel: client wants to read 102400 bytes
* schannel: encdata_buffer resized 103424
* schannel: encrypted data buffer: offset 0 length 103424
* schannel: encrypted data got 208
* schannel: encrypted data buffer: offset 208 length 103424
* schannel: decrypted data length: 179
* schannel: decrypted data added: 179
* schannel: decrypted data cached: offset 179 length 102400
* schannel: encrypted data buffer: offset 0 length 103424
* schannel: decrypted data buffer: offset 179 length 102400
* schannel: schannel_recv cleanup
* schannel: decrypted data returned 179
* schannel: decrypted data buffer: offset 0 length 102400
< HTTP/1.1 502 Bad Gateway
< server: Fly/9044e14 (2021-08-04)
< date: Sat, 07 Aug 2021 07:53:40 GMT
< via: 1.1 fly.io
< fly-request-id: 01FCFSMJQSRRXMXQF3JJ954NRF
< content-length: 0
<
* Connection #0 to host payments.paypack.rw left intact

@shemafred3 can you run this command: flyctl ips private --app payments and show me the output?

ID       REGION IP
4406adcd lhr    fdaa:0:1af2:a7b:a98:4406:adcd:2

It was some stale DNS entries. It has been solved.