Ask HN: How'd you deal with a client who insists to pay you less than decided?
What would you do if you were in this position?
What would you do if you were in this position?
The only thing you can really do now is talk to them and try to get them to pay you, but you have no real leverage.
Consider yourself lucky, freelancers get burned and not paid for a month or more of work all too frequently. Protect yourself in the future with a solid contract.
My advice: cut your losses and move on asap. You have certainly learnt a lesson the hard way which is always effective. You will never (hopefully) get into this situation because you know better now. You are wiser now.
2. Do something (if it's not too late) so client will have to come back to you for more technical help.
3. After clearing check - inform your client that you're now working on a retainer-only basis (like lawyers do).
4. When client requests your help - trigger "retainer required for further assistance" reply.
Please don't do this ever. There is no such thing as hitting them morally. If they are not paying you for extra 6 hours, they don't care about morality anyway. Value your work and get paid.
If yes, then just take whatever they give you and then don't bargain for that 6-7 hours. If they think you are easily manipulable, you might get more work from them. Take the work and you could be in a better bargaining position.