you need to get an electrician to trace the fault.
I gather there is no letting agent here.
As I understand that you got a multiple shocks from the oven (you mean cooker?) and one from a tap, and one from the wall switch (is it metal?) then I doubt the cause is the oven/cooker unless you had one hand on it all the time while you were touching the other things. Even if the cooker did have a fault (e.g. oven element insulation broken down with age), it should have an earth connection which would (1) protect you (2) cause the fuse or breaker to cut the power.
You can only get a shock if you are touching two conductive parts at the same time. E.g. any two of sink/drainer, cooker, metal switch, pipe, boiler, radiator, metal kettle, metal toaster, damp floor, damp wall, metal knife rack screwed to wall (if the screw has gone into a hidden cable). Bathrooms are especially worrisome as the person may have wet skin (which lowers resistance) which is exposed to touch, plus there are metal pipes and taps. A proper UK installation will be smothered in multiple protective measures intended to make you safe, but in your case, at least one of them has failed or is not properly done. Older installations still have protective earth conductors for metal appliances and plumbing to protect you from shock, even though they are not obliged to have RCDs. The wonderful UK 3-pin plug is part of the protective design.
Still looking forward to those photos.
If you are on a PC (not a mobile) look for a box marked "Images....Browse" under the "Add your message here" box.
If you know how to copy photos to your PC, you can "browse" to the directory where you copied them to. If you connect your phone or camera to the PC you can probably browse to them on that.