Slow upload speed

Hi all,

Hoping someone from Virgin is on here and can help.

My download speeds are fine but my upload should be around 100Mb but getting around 15 to 20Mb.

I had an engineer visit last week, he replaced the Hub and the connections at the front of my house but this didn't resolve the issue, he then popped across the road to the main box and said there is an issue with the fibre going to my property and he would arrange for someone to come out and replace it.

Yesterday I had two engineers attend who barely spoke English and couldn't understand what needed to be done, after they checked the box across the road a few times they just got in their van and drove off without saying anything and leaving me with the issue still.

The original engineer from last week said he could remotely see issues with the connection on his way to my house.

Can someone assist please?