Peugeot 3008 gearbox fault or driveshaft causing problems?

Posted a couple of days ago regarding this car and a faulty driveshaft.
The car has just been in a garage and needs a replacement nearside driveshaft replacement. The car also has another issue when travelling at low speed very recently the accerlator pops through the pedal. The garage have also noted this and stated the gearbox is likely the cause.
My issue with this car is in 2015 I had the gearbox reset as it wasn't changing gear properly and right at the end of 2016 I had to have major work done in the gearbox as it went into manual mode got stuck in manual mode due to a hydraulic issue this gearbox has so far cost me a absolute fortune,
So the question is would the gear box cause popping through the accerlator when slowing down in traffic or could it just be the faulty driveshaft causing issues there too.
Im at the end of my tether with this gearbox and if it is another gearbox issue it's goodbye to this 3008.