In this paper, we present the analysis of new radio and optical observationsof the narrow-line Seyfert 1 galaxy Mrk 783. 1.6 GHz observations performedwith the e-MERLIN interferometer confirm the presence of the diffuse emissionpreviously observed. The Very Long Baseline Array (VLBA) also detects thenuclear source both at 1.6 GHz (L-Band) and 5 GHz (C-band). While the L-bandimage shows only an unresolved core, the C-band image shows the presence of apartially resolved structure, at a position angle of 60{\deg}. The brightnesstemperature of the emission in both bands ($>10^6$ K) suggests that it is apc-scale jet produced by the AGN. The relatively steep VLBA spectral index($\alpha_{VLBA} = 0.63\pm0.03$) is consistent with the presence of opticallythin emission on milliarcsecond scales. Finally, we investigated two possiblescenarios that can result in the misalignment between the kpc and pc-scaleradio structure detected in the galaxy. We also analysed the optical morphologyof the galaxy, which suggests that Mrk 783 underwent a merging in relativelyrecent times.