You can ask for more without pretending that what was given meant nothing.

Requests often arrive shaped as complaints, because that is the easiest way to justify wanting something else. The person then hears their previous effort being cancelled, and the conversation becomes about whether they have been appreciated rather than about what you actually need. Both things are true at once: it was good, and it is not yet enough.

When you next ask for more, say the two parts in order. Name specifically what has helped, then say plainly what would help further, and keep the second part free of any grievance about the first.