Homes and businesses in Sydney's north-west have been without internet for days after underground diggers seriously damaged two Telstra cables, causing an outage.

Customers took to social media to vent about cable outages in Ryde, Eastwood, Marsfield, Denistone East and surrounding suburbs, which impacted phones, internet and Foxtel.

Customers in Ryde and surrounding suburbs are experiencing a Telstra outage. Credit:Louie Douvis

Dr Clive Simon, who runs a pharmaceutical consulting business from Eastwood, said his internet had been out since Friday and he was told it would be fixed by 7pm on Monday.

He heard from other business owners in Eastwood that they had to close their restaurants and shopfronts because they were unable to accept payments.