Problem with creating a satisfactory relationship model

Hello

I work at a medium-sized company as a data scientist. We began to work with Power BI a couple of months back, and are therefore quite new to the game. We are currently working on creating a relationship model which would fit the most of our needs, and be the base for multiple reports on the online service. 

We have some challenges figuring out exactly how the tables in our model should be related to each other without creating circular dependencies.

We have a customer database where we register single (Gifts) or recurring donations (Recurring Gifts), and where these donations come from (Packages) for a contact.

Our problem is that we in our MSSQL database (where we get our Power BI data from) also have relationships between Packages <-> Gifts, Packages <-> Recurring Gifts and Packages <-> contact. 

So far we have tried to import the model as-is from our MSSQL database with the result that Power BI deactivates atleast one of the relationships coming packages. It is not possible to activate these relationships manually as it would create a circular dependency.

An idea that we have for a solution is to create a mapping table between Packages and contacts, Gifts, Recurring Gifts.
However, this solution would be rather cumbersome to both create and use as it would create an unnecessary abstraction between our data. Furthermore, it would also likely introduce a circular dependency between Recurring Gifts, Gifts and the mapping table.

If you have any suggestions as to how to solve our problem, please leave a comment.

All help is appreciated!