Since changing to EE my internet quality has been awful

[Connord812]

My experience so far with EE has been awful, I switched from my old provider because they put their prices up and EE quote me a cheaper price (which lasted three months). Ever since then I had no end of trouble the internet works on week then stops the signal is always poor, contact them doesn't do much they say there are sending out a engineer what you never see but sometimes it works for a week or two then you have to go through the whole tedious process again. 

[XRaySpeX]

Which EE BB plan are you on including its speed? What EE router do you have (read its label or post a pix)?