Hi
I am not all that experienced myself, but your numbers make it clear that your filter is not cycled. You need to immediately do a vary large water change to bring down the ammonia and nitrite levels to as close to zero as possible. Before you throw out the old tank water give the blocked filter cartridge a swish out in the water - this might just solve the blockage problem.
Remember to dechlorinate the new water and match the temperature as close as you can. Test the water a few minutes after the change and again later today - you will probably need to do another change this evening. This is all just first aid - the levels will keep rising until the filter can cope with the ammonia your fish produce.
You also need to read the articles on fish-in cycling in the beginners resource centre at the top of this sub-forum, and if you can't rehome your fish you may be getting a lot of water changing practice. It may all sound like hard work but it is the best way to keep your fish alive.
I am no expert but it may be that pH is the least of your worries right now, but maybe one of the more experienced members can tell you about that. It would really help if you can give more info about he tank -size, volume, filter type, how long it has been set up, number and type of fish, tap water stats, type of test kit etc. All this will help get some helpful adviice on the way to you.
good luck!
