JAXB: default namespace declared in SOAP Envelop is not recognized in Body's xsi:type while unmarshalling - soap

Question

Below is a pseudo soap response coming from the server as below.
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="urn://tsys.com/xmlmessaging/T1">
<soap:Header>
<Header details/>
</soap:Header>
<soap:Body>
<inqMultiResponse>
<inqMultiResult status="000" statusMsg="passed" >
<inquireResult xsi:type="inqCustAddrResponseType" >
<addrInfo>
<addrType>Primary</addrType>
....
<x_4.0.0/>
</addrInfo>
</inquireResult>
<inquireResult xsi:type="inqGeneralAcctResponseType" status="000" statusMsg="passed">
<acctGeneralInfo>
<type>Z</type>
....
</stmtInfo>
<x_4.4.0/>
</acctGeneralInfo>
</inquireResult>
</inqMultiResult>
</inqMultiResponse>
</soap:Body>
While unmarshalling the xml using JAXB's Jaxb2Marshaller, i get the following exception in my EventHandler.
EVENT
SEVERITY: 1
MESSAGE: unrecognized type name: inqCustAddrResponseType. Did you mean {urn://tsys.com/xmlmessaging/T1}inqCustAddrResponseType?
LINKED EXCEPTION: null
LOCATOR
LINE NUMBER: -1
COLUMN NUMBER: -1
OFFSET: -1
OBJECT: null
NODE: [inquireResult: null]
URL: null
EVENT
SEVERITY: 2
MESSAGE: Unable to create an instance of com.tsys.xmlmessaging.t1.TSYSInquiryResponseType
LINKED EXCEPTION: java.lang.InstantiationException
LOCATOR
LINE NUMBER: -1
COLUMN NUMBER: -1
OFFSET: -1
OBJECT: null
NODE: [inquireResult: null]
URL: null
Below is my spring configuration.
<bean id="tsysTransactionMarshaller" class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
<property name="validationEventHandler" ref="validationEventHandler" />
<property name="contextPaths">
<list>
<value>com.tsys.xmlmessaging.t1</value>
</list>
</property>
</bean>
Request you to pls help me unmarshall the xml.
I have gone through various suggestions like
JAXB xsi:type subclass unmarshalling not working
and Blaise D blogs, but none of them talk of using it with Jaxb2Marshaller as in my case.
Please note,
- The classes are generated using XJC. Not including here to ensure that i dont clutter with unnecessary information. let me know if more info is required.
- We are not having any control on the xml soap response sent from server and hence we may not be able to change them.