Try to remove the previous partner from partner of record. Check when the expiry of the licenses are, MS usually allows a grace period to renew and makes it quite.clear on the portal when things expire. It's pretty much a matter of renewing and assigning licenses.
Another thing, MS pricing direct to market vs via partner is different (higher in direct to market - at least used to be) some partners who primarily make their money off services pass these price cuts to clients because it allows them a foot in the door and it is usually not worth it to keep the small difference. This is true for enterprise licences not sure how the bon profit SKUs work. So check if a partner cost is lower before going directly to MS.