Recursion problem

[Jens-Martin Groenne]

I have a problem with the following code.
When I call this function it actually makes n calls to the functions
getCustomer and getAddress, where n is the number of customerIds and
addressIds in the Criteria.

Can anyone point out to me what I have done wrong?

Here is the code:
declare function tns:getCustomer($Criteria as element(ns30:Criteria)) as
element(ns28:Customer)*{

            let $CustCustomers := ns32:getCustomer(
                    <ns33:CustCriteria>
                        {
                        for $customerId in
fn:distinct-values($Criteria/ns30:customerId)
                        return
                        <ns33:custId>{fn:data($customerId)}</ns33:custId>
                        }
                    </ns33:CustCriteria>
                )

              let $AddAddresses := ns7:getAddress(
                    <ns8:AddressGetCriteria>
                    {
                    for $addressId in
fn:distinct-values($Criteria/ns30:addressId)
                    return
                    <ns8:farId>{fn:data($addressId)}</ns8:farId>
                    }
                    </ns8:AddressGetCriteria>
                )


              for   $searchCustomer in $Criteria
              return
                for  $resultCustomer in $CustCustomers/ns28:Customer
                where $searchCustomer/ns30:customerId =
$resultCustomer/ns28:customerId
                return
                <ns28:Customer>
                {
                for $Person in $resultCustomer/ns28:Person
                return $Person
                }
                {
                for $Organization in $resultCustomer/ns28:Organization
                return $Organization
                }

                {
                for $resultAddress in $AddAddresses
                    where $resultAddress/ns29:addressId =
$searchCustomer/ns30:addressId
                    return
                    $resultAddress
                }
            </ns28:Customer>

};