A very common service call these days is for scanning issues. However, in most cases the problem is with the network or pc settings or even the email. People don’t like hearing this but is rarely the hardware causing the problem. One quick way to check that is reboot both the copier/MFP and the PC. You need to turn off the main power switch on the copier; not just the on/off button on the control panel.
If that doesn’t fix it you should contact your computer or IT person. I realize that may cost you money but they can usually remote in and diagnose the problem and there might not be a charge. You might even have a contract with the person already. Most IT people can diagnose these kind of problems but not all. We have met a variety of competence levels from people who carry the title of “IT”.
If they can’t fix it and you call a copier company keep in mind that IT support is outside the scope of a traditional break/fix maintenance agreement which means you’ll get billed anyway. If the copier tech does come out and is unsuccessful they at least have access to the manufacturers tech support which should help.
If it is determined that it isn’t the copier causing the scanning problem then maybe it’s time to find a new IT person or get one if you’re trying to do it yourself. I understand your frustration with scanning problems but the above discussion is based on years of experience handling these sorts of calls.