Observable retry / retryWhen with flatmap

I have the following code to get id and then data related to the id.

process(): Observable<any> {
    let id: number;
    return this.getId().flatMap(
        (response: number) => {
                id = response;
                return this.getData(id)
        }
    ).flatMap(
        (data: any) => {
            return Observable.of(data);
        }
    );
}

getData(id: number): Observable<any> {
    // retry if response.status is not complete
    return this.service.getData(id).map(response => return response.data); 
}

I would like to add retry logic on getData method until response.status is not complete. I tried adding retry/retryWhen after this.getData(id) but no luck. Any suggestions please?