High latency Wifi and Ethernet

Hi,

I recently joined TalkTalk transfered from a previous ISP in the same home.

I'm experimenting unusual high latency while playing games online.

Via Wifi 5ghz my average ms is between 35-60ms.

Via Ethernet my average ms is 19ms fixed.

With my previous ISP I could reach 10ms via Wifi, didn't even need an ethernet connection because the ms was good enough.

Any clue how could I solve this issue?

Thanks