Weird sound during hard acceleration after diesel injector and pump repair/service.

Hi,

I have a 2016. Skoda Fabia 1.4 TDI 77kw. I sent my injectors as well as the fuel pump for service because the car had a rough idle and was shaking. The first time I picked up the car two days ago, it ran smoother, didn't shake anymore, but when I accelerated, there was a weird knocking sound around 2000 RPM's, that was there prior to the servicing, but wasn't there prior to the injectors and fuel pump needing service, so I figured I take it back to the shop to see if anything is wrong. They found that the one of the fuel hoses had disconnected partially, and that it was a bit rotten, so they shortened it to where the "healthy" hose starts, put it back and said that now the engine should not be making any noise during hard acceleration. I tested it again yesterday, the car runs a bit smoother again, but the weird knocking sound is still there. And then, when I got home, I noticed some rattle during idle (I'll attach audio recordings of it). What can be the problem? I will drive the car today a bit more to see if the problem goes away with driving, but I doubt it will. 

Thanks!

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